This seminar report summarizes major earthquakes that have impacted India and their effects. It discusses the causes and types of earthquakes, and how they are measured and classified. It then analyzes several destructive earthquakes in India's history from 1819 to 1997, including the Cutch earthquake, Assam earthquake, Bihar-Nepal earthquake, Koyna earthquake, Uttarkashi earthquake, and Killar (Latur) earthquake. It also outlines the response and relief efforts of the Indian government following damaging quakes. Finally, it briefly predicts future earthquake risks in India.
This document summarizes information about the 2015 Nepal earthquake. It provides details on the earthquake's magnitude, location, damage and casualties. It discusses the earthquake's economic and infrastructure impacts, as well as response and reconstruction efforts. Challenges included weak governance, infrastructure and preparedness. Recommendations focus on improving disaster risk reduction protocols, building standards, education and political stability.
An earthquake occurred in Indian-controlled Kashmir that registered a magnitude of 5.7 on the Richter scale. Nine people were injured and several buildings were damaged, including two schools and four residential buildings. Cell phone communications were also disrupted. Earthquakes are the result of a sudden release of energy in the Earth's crust that creates seismic waves. Major past earthquakes in India provide a baseline for disaster planning. The Disaster Management Act of 2005 establishes institutions and coordination mechanisms for effective earthquake disaster management at national, state, and district levels.
On January 26, 2001 a magnitude 7.7 earthquake struck near Bhuj, Gujarat, India. The earthquake caused widespread damage, with over 20,000 fatalities and 167,000 injuries. Entire villages were destroyed and infrastructure such as hospitals and industries were severely damaged. Ground motions were estimated to be over 0.6g near the epicenter. Studies of the aftershocks found two dominant fault trends and the main shock is believed to have reactivated the Kutch Mainland Fault due to compressional stresses. The earthquake highlighted the vulnerability of structures in the region, which were not designed for earthquake resistance.
Earthquake is a violent tremor in the earth’s crust, sending out a series of shock waves in all directions from its place of origin or epicenter.
Earthquakes constitute one of the worst natural hazards which often turn into disaster causing widespread destruction and loss to human life.
So we have to take data from the historical hazardous and effect , magnitude of earthquake vibration generated from epicenter.
Earthquake causes and safety measurementsM Aamer Raza
The document discusses earthquake engineering concepts. It provides information on group members, defines key earthquake terms like focus, epicenter and fault lines. It describes the causes of earthquakes including surface causes, volcanic causes and tectonic plate movement. It explains different types of seismic waves and how the Richter scale is used to measure earthquake magnitudes. Construction techniques to resist earthquakes are also summarized like using shear walls, bracing, dampers, base isolation and light weight materials.
Earthquakes are common in India due to the collision of the Indian and Eurasian tectonic plates forming the Himalayan mountains. Some major earthquakes include the 1993 Latur earthquake that killed over 10,000 people, and the 1991 Uttarkashi earthquake along the Main Central Thrust fault. Studying earthquakes created by reservoirs, such as at Koyna, provides insights into how stress changes can trigger seismic activity. Public education efforts have increased awareness of earthquakes in India following destructive events and new monitoring technologies.
Abdul Tayash presented a seminar on earthquakes for the 5th semester civil engineering students at Govt Polytechnic Harapanahalli. The seminar covered the introduction to earthquakes, types of earthquakes and seismic waves, and effects of earthquakes such as soil liquefaction, landslides, fires, tsunamis, and floods. Abdul concluded that earthquakes are a natural destructive force that occur along plate boundaries, and while we can predict where they will happen, not when. Engineers work to design earthquake-resilient structures and retrofit older buildings.
Landslides occur when several factors converge, including heavy rainfall, earthquakes, volcanic eruptions, construction activities, and deforestation. They can cause significant damage by destroying infrastructure like roads, buildings, and bridges. Some high-risk areas include mountainous regions and coastal cliffs. To reduce landslide risk, proper drainage systems and replanting vegetation on slopes is recommended. During a landslide, it is important to seek high ground and avoid further endangering rescue workers.
This document summarizes information about the 2015 Nepal earthquake. It provides details on the earthquake's magnitude, location, damage and casualties. It discusses the earthquake's economic and infrastructure impacts, as well as response and reconstruction efforts. Challenges included weak governance, infrastructure and preparedness. Recommendations focus on improving disaster risk reduction protocols, building standards, education and political stability.
An earthquake occurred in Indian-controlled Kashmir that registered a magnitude of 5.7 on the Richter scale. Nine people were injured and several buildings were damaged, including two schools and four residential buildings. Cell phone communications were also disrupted. Earthquakes are the result of a sudden release of energy in the Earth's crust that creates seismic waves. Major past earthquakes in India provide a baseline for disaster planning. The Disaster Management Act of 2005 establishes institutions and coordination mechanisms for effective earthquake disaster management at national, state, and district levels.
On January 26, 2001 a magnitude 7.7 earthquake struck near Bhuj, Gujarat, India. The earthquake caused widespread damage, with over 20,000 fatalities and 167,000 injuries. Entire villages were destroyed and infrastructure such as hospitals and industries were severely damaged. Ground motions were estimated to be over 0.6g near the epicenter. Studies of the aftershocks found two dominant fault trends and the main shock is believed to have reactivated the Kutch Mainland Fault due to compressional stresses. The earthquake highlighted the vulnerability of structures in the region, which were not designed for earthquake resistance.
Earthquake is a violent tremor in the earth’s crust, sending out a series of shock waves in all directions from its place of origin or epicenter.
Earthquakes constitute one of the worst natural hazards which often turn into disaster causing widespread destruction and loss to human life.
So we have to take data from the historical hazardous and effect , magnitude of earthquake vibration generated from epicenter.
Earthquake causes and safety measurementsM Aamer Raza
The document discusses earthquake engineering concepts. It provides information on group members, defines key earthquake terms like focus, epicenter and fault lines. It describes the causes of earthquakes including surface causes, volcanic causes and tectonic plate movement. It explains different types of seismic waves and how the Richter scale is used to measure earthquake magnitudes. Construction techniques to resist earthquakes are also summarized like using shear walls, bracing, dampers, base isolation and light weight materials.
Earthquakes are common in India due to the collision of the Indian and Eurasian tectonic plates forming the Himalayan mountains. Some major earthquakes include the 1993 Latur earthquake that killed over 10,000 people, and the 1991 Uttarkashi earthquake along the Main Central Thrust fault. Studying earthquakes created by reservoirs, such as at Koyna, provides insights into how stress changes can trigger seismic activity. Public education efforts have increased awareness of earthquakes in India following destructive events and new monitoring technologies.
Abdul Tayash presented a seminar on earthquakes for the 5th semester civil engineering students at Govt Polytechnic Harapanahalli. The seminar covered the introduction to earthquakes, types of earthquakes and seismic waves, and effects of earthquakes such as soil liquefaction, landslides, fires, tsunamis, and floods. Abdul concluded that earthquakes are a natural destructive force that occur along plate boundaries, and while we can predict where they will happen, not when. Engineers work to design earthquake-resilient structures and retrofit older buildings.
Landslides occur when several factors converge, including heavy rainfall, earthquakes, volcanic eruptions, construction activities, and deforestation. They can cause significant damage by destroying infrastructure like roads, buildings, and bridges. Some high-risk areas include mountainous regions and coastal cliffs. To reduce landslide risk, proper drainage systems and replanting vegetation on slopes is recommended. During a landslide, it is important to seek high ground and avoid further endangering rescue workers.
WHAT IS AN EARTHQUAKE?
Where Do Earthquakes Happen?
Why Do Earthquakes Happen?
How Are Earthquakes Studied?
How To Locate The Earthquake's Epicenter?
SCALES FOR EARTHQUAKE MEASUREMENT
What Are Earthquake Hazards?
Causes, Effects and Precautions against Earthquakesaqlain_01
1. Earthquakes are caused by the movement of tectonic plates deep below the Earth's surface. As the plates shift and grind against each other, they release energy in the form of seismic waves.
2. Major earthquakes can cause widespread damage to infrastructure like buildings, bridges and dams, resulting in loss of life and property. They can also trigger secondary hazards such as landslides, tsunamis and fires.
3. Pakistan is prone to earthquakes, with major fault lines running along its western border. Some of the deadliest quakes in the country's history include the 2005 Kashmir earthquake that killed over 80,000 people and the 2013 Balochistan earthquake that killed 825.
The 2015 Nepal earthquake occurred on April 25th with a magnitude of 7.8. It killed over 6,700 people and injured over twice as many. The earthquake destroyed many UNESCO World Heritage sites in Kathmandu, including buildings at the Kathmandu, Patan, and Bhaktapur Durbar Squares. It also triggered avalanches on Mount Everest that killed at least 19 climbers, making it the deadliest day in Everest's history. The earthquake severely damaged Nepal's infrastructure and economy, which was already one of Asia's poorest countries.
Earthquacke Elastic Rebound Theory Types of WavesShakeel Ahmad
1) The document discusses the causes and types of earthquakes. It explains that earthquakes are caused by the sudden release of built-up energy between tectonic plates, which generates seismic waves.
2) It describes the elastic rebound theory of earthquakes, which states that stress gradually builds up along faults until it is suddenly released, causing the plates to snap back in an earthquake.
3) There are different types of seismic waves generated - P waves, S waves, and surface waves including Rayleigh and Love waves. P and S waves travel through the earth's interior as body waves, while surface waves travel along the surface.
Earthquake seismology uses seismic waves generated by earthquakes to study the interior of the Earth. Seismic waves are detected by seismographs and include P-waves, S-waves, and surface waves. The location and depth of the initial rupture point within the Earth is known as the hypocenter and epicenter, respectively. Larger earthquakes with shallower depths typically cause more damage. Earthquake magnitude represents the energy released while intensity refers to the strength of shaking experienced at a particular location.
This topic includes representation of topography by various non mathematical and mathematical methods.
Pictorial method (Hachure lines, Hill shading)
Mathematical method (Spot heights,Bench marks, Trigonometrical stations, Layer tint or altitude tints, Contour lines )
Combination of different methods
This document discusses floods, including definitions, types, causes, impacts, and management. It begins by defining disasters and noting that floods are a common natural phenomenon in parts of India. The objectives are to identify flood causes and impacts. Different types of floods are described like flash floods, river floods, and coastal floods. Causes include heavy rainfall, river obstructions, and dam/levee failures. Impacts involve loss of life, property damage, disease spread, and economic disruption. Flood forecasting, control methods, and the benefits of some floods are also outlined. Statistics on India's flood-prone areas and damages are presented.
1. The document provides an overview of earthquakes, their causes, characteristics, effects, and preparedness measures. It describes how earthquakes are caused by the movement of tectonic plates and buildup of elastic strain energy that is suddenly released.
2. Key characteristics discussed include the different types of seismic waves that cause shaking and damage, the measurement scales used to describe magnitude versus intensity, and secondary hazards like landslides, liquefaction, and tsunamis.
3. Typical effects of earthquakes outlined are physical damage to structures, infrastructure and property, casualties, and public health issues in the aftermath.
The document discusses several earthquakes, including:
1) The worst earthquake in India occurred on January 26, 2001 in the Kutch district of Gujarat, with an estimated intensity of 6.9-7.7 on the Richter scale.
2) The worst earthquake in the world was a 7.8 magnitude quake that struck Nepal on April 25, 2015, killing at least 5,000 people and injuring 10,000 more. It destroyed major monuments and world heritage sites near Kathmandu.
3) Earthquakes can have devastating effects by damaging infrastructure and claiming many lives.
The document provides an overview of earthquakes and seismology. It discusses key topics such as:
- Seismology is the study of earthquakes and seismic waves. Earthquakes are caused by the sudden movement of tectonic plates.
- The movement of tectonic plates is driven by convection currents in the earth's mantle. As plates move against each other, strain builds up at plate boundaries and is released through earthquakes.
- India experiences earthquakes due to its location in a seismically active zone where the Indian plate is moving northward into the Eurasian plate. The country is divided into several seismic zones based on expected earthquake intensities.
This document discusses earthquake hazards and mitigation. It notes that approximately 500,000 earthquakes occur each year, with around 100 being potentially dangerous. Major earthquakes typically occur annually and can release large amounts of seismic energy. Earthquakes cause damage through ground shaking, liquefaction, landslides, fires, and tsunamis. Mitigation strategies include avoiding hazard areas, building earthquake resistant structures using special materials and construction techniques, improving weak soils, and reducing seismic demand on structures. Proper architectural design and reinforcement of masonry and reinforced concrete buildings can also improve earthquake resistance.
This document provides an overview of seismotectonics and its importance in understanding earthquake hazards. It defines seismotectonics as the relationship between earthquakes, active tectonics and faults in a region. Seismotectonic maps and zonation are used to identify active faults and determine zones of similar seismic potential. Together with information on regional tectonics, historical seismicity, and stress fields, seismotectonics allows scientists to assess earthquake hazards by identifying capable faults. The document outlines these concepts and techniques and provides examples of seismotectonic analysis in Pakistan.
Geologically active faults within 50 to 500km distance from Dhaka. Dhaka is among the 20 major world cities that are the greatest risk from earthquakes. Some of these earthquakes especially the 1762, 1812, 1865, 1885 and 1897 happened in Dhaka. If 7-8 grade in Richter Scale earthquake happen in Dhaka 70-80 percent concrete structures would just collapse and 30,00,000 peoples will die.
This presentation gives detailed information about earthquake , its types , waves , faults , especially in asian countries .A detailed case study of earthquake In NEPAL in 2015 is also covered in this with pictures . Also how it is measured and its warning system , vulnerability, deployment and future aspects has been covered .
HOPE YOU LIKE IT AND GET FULL INFORMATION!!!!!
This document provides information about landslides. It begins by defining landslides and describing common landslide types such as rotational, translational, rock fall, and debris flow. It then discusses the natural and human-induced causes of landslides including geological factors, heavy rainfall, earthquakes, deforestation, and construction activities. The document also examines the indicators, effects, and major landslide events in India. It concludes by outlining various landslide preparedness, mitigation, and safety measures.
The document discusses various natural disasters that have impacted India between 1997 and 2010, including earthquakes, cyclones, tsunamis, floods, landslides, and storms. It provides details on specific natural disasters such as the 2004 Indian Ocean earthquake and tsunami that killed over 230,000 people across 14 countries, and the 2005 Kashmir earthquake that killed 75,000 people in Pakistan and India. The conclusion emphasizes that while natural disasters are inevitable, vulnerability can be reduced through effective disaster management and public education.
A natural vibration of the ground or the earth crust produced by forces is called earthquake or seismic forces.
An earthquake is what happens when two blocks of the earth suddenly slip past one another.
Earthquake
1.Interior of earth
2.Convection currents cause the movement of plates
3.Tectonic Plate
4.Why do earthquakes occur?
5.Where do earthquakes occur.
6.Definitions
7.Seismic waves: forms
8.Measuring earthquakes
9.Classification of earthquake
10.Locating the shaking
11.Earthquake risk and prediction
12.Short-term predictions
13.Impacts of Earthquake Prediction
This document provides an overview of earthquakes. It begins with a brief history of earthquake studies from ancient times through modern developments in seismology. Key concepts introduced include the location of the hypocenter and epicenter, and the different types of seismic waves generated by earthquakes. The document then discusses the causes of earthquakes in relation to plate tectonics and fault ruptures. Different scales for measuring the intensity and magnitude of earthquakes are presented, including the Mercalli and Richter scales. Locations of historic destructive quakes are also highlighted.
An earthquake is a violent and abrupt shaking of the ground, caused by movement between tectonic plates along a fault line in the earth's crust. Earthquakes can result in the ground shaking, soil liquefaction, landslides, fissures, avalanches, fires and tsunamis.
How do you describe an earthquake?
A large earthquake far away will feel like a gentle bump followed several seconds later by stronger rolling shaking that may feel like sharp shaking for a little while. A small earthquake nearby will feel like a small sharp jolt followed by a few stronger sharp shakes that pass quickly.
Civil Engineering
Earth Quake Data
Earth Layers
Plate Tectonics
Seismic Waves
Effects of Earthquake
Epicenter of Earthquake
Damages by Earthquake
Earthquakes are caused by the sudden release of energy in the earth's crust that generates seismic waves. The location within the earth where rupture first occurs is known as the focus or hypocenter, while the point on the surface directly above is called the epicenter. Different types of seismic waves travel through the earth's interior or along its surface, causing shaking and damage. By measuring the arrival times of these waves at multiple seismograph stations, scientists can determine the epicenter location. Earthquakes are measured on the Richter scale by magnitude or the Mercalli scale by observed intensity. India experiences frequent earthquakes and is divided into different seismic zones based on risk levels. Major quakes have caused widespread destruction and loss of life in
WHAT IS AN EARTHQUAKE?
Where Do Earthquakes Happen?
Why Do Earthquakes Happen?
How Are Earthquakes Studied?
How To Locate The Earthquake's Epicenter?
SCALES FOR EARTHQUAKE MEASUREMENT
What Are Earthquake Hazards?
Causes, Effects and Precautions against Earthquakesaqlain_01
1. Earthquakes are caused by the movement of tectonic plates deep below the Earth's surface. As the plates shift and grind against each other, they release energy in the form of seismic waves.
2. Major earthquakes can cause widespread damage to infrastructure like buildings, bridges and dams, resulting in loss of life and property. They can also trigger secondary hazards such as landslides, tsunamis and fires.
3. Pakistan is prone to earthquakes, with major fault lines running along its western border. Some of the deadliest quakes in the country's history include the 2005 Kashmir earthquake that killed over 80,000 people and the 2013 Balochistan earthquake that killed 825.
The 2015 Nepal earthquake occurred on April 25th with a magnitude of 7.8. It killed over 6,700 people and injured over twice as many. The earthquake destroyed many UNESCO World Heritage sites in Kathmandu, including buildings at the Kathmandu, Patan, and Bhaktapur Durbar Squares. It also triggered avalanches on Mount Everest that killed at least 19 climbers, making it the deadliest day in Everest's history. The earthquake severely damaged Nepal's infrastructure and economy, which was already one of Asia's poorest countries.
Earthquacke Elastic Rebound Theory Types of WavesShakeel Ahmad
1) The document discusses the causes and types of earthquakes. It explains that earthquakes are caused by the sudden release of built-up energy between tectonic plates, which generates seismic waves.
2) It describes the elastic rebound theory of earthquakes, which states that stress gradually builds up along faults until it is suddenly released, causing the plates to snap back in an earthquake.
3) There are different types of seismic waves generated - P waves, S waves, and surface waves including Rayleigh and Love waves. P and S waves travel through the earth's interior as body waves, while surface waves travel along the surface.
Earthquake seismology uses seismic waves generated by earthquakes to study the interior of the Earth. Seismic waves are detected by seismographs and include P-waves, S-waves, and surface waves. The location and depth of the initial rupture point within the Earth is known as the hypocenter and epicenter, respectively. Larger earthquakes with shallower depths typically cause more damage. Earthquake magnitude represents the energy released while intensity refers to the strength of shaking experienced at a particular location.
This topic includes representation of topography by various non mathematical and mathematical methods.
Pictorial method (Hachure lines, Hill shading)
Mathematical method (Spot heights,Bench marks, Trigonometrical stations, Layer tint or altitude tints, Contour lines )
Combination of different methods
This document discusses floods, including definitions, types, causes, impacts, and management. It begins by defining disasters and noting that floods are a common natural phenomenon in parts of India. The objectives are to identify flood causes and impacts. Different types of floods are described like flash floods, river floods, and coastal floods. Causes include heavy rainfall, river obstructions, and dam/levee failures. Impacts involve loss of life, property damage, disease spread, and economic disruption. Flood forecasting, control methods, and the benefits of some floods are also outlined. Statistics on India's flood-prone areas and damages are presented.
1. The document provides an overview of earthquakes, their causes, characteristics, effects, and preparedness measures. It describes how earthquakes are caused by the movement of tectonic plates and buildup of elastic strain energy that is suddenly released.
2. Key characteristics discussed include the different types of seismic waves that cause shaking and damage, the measurement scales used to describe magnitude versus intensity, and secondary hazards like landslides, liquefaction, and tsunamis.
3. Typical effects of earthquakes outlined are physical damage to structures, infrastructure and property, casualties, and public health issues in the aftermath.
The document discusses several earthquakes, including:
1) The worst earthquake in India occurred on January 26, 2001 in the Kutch district of Gujarat, with an estimated intensity of 6.9-7.7 on the Richter scale.
2) The worst earthquake in the world was a 7.8 magnitude quake that struck Nepal on April 25, 2015, killing at least 5,000 people and injuring 10,000 more. It destroyed major monuments and world heritage sites near Kathmandu.
3) Earthquakes can have devastating effects by damaging infrastructure and claiming many lives.
The document provides an overview of earthquakes and seismology. It discusses key topics such as:
- Seismology is the study of earthquakes and seismic waves. Earthquakes are caused by the sudden movement of tectonic plates.
- The movement of tectonic plates is driven by convection currents in the earth's mantle. As plates move against each other, strain builds up at plate boundaries and is released through earthquakes.
- India experiences earthquakes due to its location in a seismically active zone where the Indian plate is moving northward into the Eurasian plate. The country is divided into several seismic zones based on expected earthquake intensities.
This document discusses earthquake hazards and mitigation. It notes that approximately 500,000 earthquakes occur each year, with around 100 being potentially dangerous. Major earthquakes typically occur annually and can release large amounts of seismic energy. Earthquakes cause damage through ground shaking, liquefaction, landslides, fires, and tsunamis. Mitigation strategies include avoiding hazard areas, building earthquake resistant structures using special materials and construction techniques, improving weak soils, and reducing seismic demand on structures. Proper architectural design and reinforcement of masonry and reinforced concrete buildings can also improve earthquake resistance.
This document provides an overview of seismotectonics and its importance in understanding earthquake hazards. It defines seismotectonics as the relationship between earthquakes, active tectonics and faults in a region. Seismotectonic maps and zonation are used to identify active faults and determine zones of similar seismic potential. Together with information on regional tectonics, historical seismicity, and stress fields, seismotectonics allows scientists to assess earthquake hazards by identifying capable faults. The document outlines these concepts and techniques and provides examples of seismotectonic analysis in Pakistan.
Geologically active faults within 50 to 500km distance from Dhaka. Dhaka is among the 20 major world cities that are the greatest risk from earthquakes. Some of these earthquakes especially the 1762, 1812, 1865, 1885 and 1897 happened in Dhaka. If 7-8 grade in Richter Scale earthquake happen in Dhaka 70-80 percent concrete structures would just collapse and 30,00,000 peoples will die.
This presentation gives detailed information about earthquake , its types , waves , faults , especially in asian countries .A detailed case study of earthquake In NEPAL in 2015 is also covered in this with pictures . Also how it is measured and its warning system , vulnerability, deployment and future aspects has been covered .
HOPE YOU LIKE IT AND GET FULL INFORMATION!!!!!
This document provides information about landslides. It begins by defining landslides and describing common landslide types such as rotational, translational, rock fall, and debris flow. It then discusses the natural and human-induced causes of landslides including geological factors, heavy rainfall, earthquakes, deforestation, and construction activities. The document also examines the indicators, effects, and major landslide events in India. It concludes by outlining various landslide preparedness, mitigation, and safety measures.
The document discusses various natural disasters that have impacted India between 1997 and 2010, including earthquakes, cyclones, tsunamis, floods, landslides, and storms. It provides details on specific natural disasters such as the 2004 Indian Ocean earthquake and tsunami that killed over 230,000 people across 14 countries, and the 2005 Kashmir earthquake that killed 75,000 people in Pakistan and India. The conclusion emphasizes that while natural disasters are inevitable, vulnerability can be reduced through effective disaster management and public education.
A natural vibration of the ground or the earth crust produced by forces is called earthquake or seismic forces.
An earthquake is what happens when two blocks of the earth suddenly slip past one another.
Earthquake
1.Interior of earth
2.Convection currents cause the movement of plates
3.Tectonic Plate
4.Why do earthquakes occur?
5.Where do earthquakes occur.
6.Definitions
7.Seismic waves: forms
8.Measuring earthquakes
9.Classification of earthquake
10.Locating the shaking
11.Earthquake risk and prediction
12.Short-term predictions
13.Impacts of Earthquake Prediction
This document provides an overview of earthquakes. It begins with a brief history of earthquake studies from ancient times through modern developments in seismology. Key concepts introduced include the location of the hypocenter and epicenter, and the different types of seismic waves generated by earthquakes. The document then discusses the causes of earthquakes in relation to plate tectonics and fault ruptures. Different scales for measuring the intensity and magnitude of earthquakes are presented, including the Mercalli and Richter scales. Locations of historic destructive quakes are also highlighted.
An earthquake is a violent and abrupt shaking of the ground, caused by movement between tectonic plates along a fault line in the earth's crust. Earthquakes can result in the ground shaking, soil liquefaction, landslides, fissures, avalanches, fires and tsunamis.
How do you describe an earthquake?
A large earthquake far away will feel like a gentle bump followed several seconds later by stronger rolling shaking that may feel like sharp shaking for a little while. A small earthquake nearby will feel like a small sharp jolt followed by a few stronger sharp shakes that pass quickly.
Civil Engineering
Earth Quake Data
Earth Layers
Plate Tectonics
Seismic Waves
Effects of Earthquake
Epicenter of Earthquake
Damages by Earthquake
Earthquakes are caused by the sudden release of energy in the earth's crust that generates seismic waves. The location within the earth where rupture first occurs is known as the focus or hypocenter, while the point on the surface directly above is called the epicenter. Different types of seismic waves travel through the earth's interior or along its surface, causing shaking and damage. By measuring the arrival times of these waves at multiple seismograph stations, scientists can determine the epicenter location. Earthquakes are measured on the Richter scale by magnitude or the Mercalli scale by observed intensity. India experiences frequent earthquakes and is divided into different seismic zones based on risk levels. Major quakes have caused widespread destruction and loss of life in
This slide is prepared by me under guidance of my teacher Nirmal Kafle for general understanding about Earthquake and Seismicity. I am very thankful to my teacher and friends. I hope this slide may help you to understand about to understand something about Earthquake.
The document discusses earthquakes, including what causes them, how they are measured, their effects, and statistics on major earthquakes around the world. Specifically, it defines an earthquake as rapid shaking caused by the sudden release of energy along fault lines. It describes the movement of tectonic plates and how this results in earthquakes. Key points covered include earthquake magnitude scales, the different types of seismic waves generated, and data on some of the largest earthquakes by magnitude and their impacts.
This document discusses seismic waves, earthquakes, and seismology. It begins by listing the objectives of describing seismic wave types, finding earthquake epicenters, earthquake magnitude scales, and challenges predicting earthquakes. It then defines earthquakes and seismology, the study of earthquakes. It describes how seismographs are used to record seismic waves from earthquakes. It discusses elastic rebound theory, earthquake focus and epicenter, where earthquakes occur, and the different types of seismic waves. The document concludes by covering earthquake classification, damage causes, challenges predicting earthquakes, earthquake prone areas, and safety tips before, during, and after an earthquake.
Seismology is the study of earthquakes and seismic waves. It has four main branches: observational seismology which records earthquakes and catalogs them; engineering seismology which estimates seismic hazards; physical seismology which studies the interior of the Earth; and exploratory seismology which uses seismic methods for applications like oil exploration. The study of seismology helps us understand earthquakes, predict their effects, and design structures to withstand shaking. It provides insights by analyzing seismic waves recorded on seismograms at stations around the world.
Earthquake: A Tragedy to life and propertyVanshika Singh
An earthquake is the shaking of the Earth's surface caused by a sudden release of energy in the Earth's lithosphere. This social science project discusses earthquakes, including what they are, their causes, effects, and protection against them. Some key points made are that earthquakes result from the movement of tectonic plates and built-up pressure being released. Their effects include ground shaking, ground ruptures, landslides, tsunamis, and fires. Protection involves earthquake-resistant building construction and safety precautions during shaking. Some of the deadliest earthquakes mentioned caused thousands of deaths, such as in Nepal in 2015 and Japan in 2011.
The document discusses tectonic plate processes and earthquakes. It describes how earthquakes occur at plate boundaries due to stresses from plate movements. Earthquakes at divergent boundaries pose little risk while those at convergent boundaries can be very hazardous, as seen in the 1985 Mexico City earthquake that killed over 10,000 people. The document also discusses earthquake measurement scales, the different types of seismic waves, and secondary hazards like tsunamis, landslides and liquefaction that can amplify earthquake damage.
An earthquake is caused by a sudden release of energy in the Earth's crust that creates seismic waves. The focus is the point of origin underground, while the epicenter is where it breaks the surface. Different types of seismic waves like P, S, and L waves propagate outward. Earthquakes can be classified by depth, cause, and location. Areas prone to quakes are along plate boundaries like the Circum-Pacific belt. Proper engineering can help make structures earthquake resistant.
1) Most earthquakes originate from a sudden release of energy at the focus or hypocenter located beneath the earth's surface.
2) Faults are fractures in the earth's crust where movement has occurred. The 1906 San Francisco earthquake involved slippage of 4.7 meters along the San Andreas Fault.
3) Earthquake waves spread out from the focus in all directions. P and S waves can be used to locate the earthquake's epicenter through triangulation of arrival times at multiple stations.
The document provides an overview of earthquakes, including:
- The interior structure of the Earth is differentiated, with denser materials in the core and lighter materials in the crust. Convective flows in the mantle cause tectonic plates to move.
- Plates interact through convergent, divergent, and transform boundaries. Strain builds up in plates and is released during earthquakes by sudden slip along faults.
- Earthquakes release enormous energy and generate seismic waves that travel through the Earth. Magnitude measures the energy released while intensity measures shaking severity at a location.
- India has experienced damaging past quakes and is divided into seismic zones based on expected intensity levels in different regions.
This document provides an overview of the Certificate Programme in Disaster Management (CDM) offered by IGNOU. It outlines the contents of Block 2, which covers the typology of different types of disasters including earthquakes, floods, cyclones, and droughts/famines. For each disaster type, there are multiple units that describe the introduction, characteristics, vulnerability factors, impacts/effects, and risk reduction measures. The document provides foundational knowledge on understanding different natural hazards and their consequences.
An earthquake (also known as a quake, tremor or temblor) is is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to the people around and destroy whole cities.
An earthquake is caused by a sudden release of energy stored in rocks below the earth's surface. Most earthquakes occur along existing faults in the earth's crust. There are two key terms used to describe the location of earthquakes - the focus, which is the location below the surface where fault movement begins, and the epicenter, which is the point directly above the focus on the surface.
Earthquake and earthquake resistant designPARVEEN JANGRA
This document discusses earthquake-resistant design of structures. It begins with an overview of earthquakes, including their characterization, causes, waves, and effects. It then covers earthquake-resistant design principles, retrofitting existing structures, and analysis of structural response. Key points include:
- Earthquakes are caused by tectonic plate movements or other surface events like volcanic eruptions. They generate P, S, and L waves that damage structures.
- Structures should be designed to resist earthquake forces through seismic bands, interlocking walls, and other techniques. Retrofitting improves existing structures.
- Analysis considers single-degree-of-freedom and multi-degree-of-freedom structural models subjected
This document provides information about earthquakes. It begins with definitions of key terms like focus, epicenter, and fault lines. It then discusses the causes of earthquakes, including faults in the earth's crust. It describes the different types of faults and waves produced by earthquakes, such as P waves, S waves, and surface waves. The document outlines the effects of earthquakes and how their strength is measured using the Richter scale. It also discusses earthquake monitoring and seismographs.
Earthquakes are caused by the sudden release of energy along fault lines in the earth's crust. The effects of earthquakes vary based on their magnitude and can include widespread destruction and loss of life. Seismic waves, including compressional P-waves and shear S-waves, travel outward from the hypocenter or focus of the earthquake. The location of the epicenter at the earth's surface directly above the focus can be determined using seismic data from multiple monitoring stations. Earthquakes are measured on scales such as the Richter scale and Modified Mercalli intensity scale.
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2) Different types of seismic waves - P, S, and surface waves - are produced and how they travel through the Earth.
3) Major earthquake zones exist along plate boundaries like the Circum-Pacific belt and Alpide belt, and earthquakes are measured on the Richter scale from small to great quakes over magnitude 8.
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ANALYSIS OF EARTHQUAKE IN THE INDIA AND ITS EFFECT
1. SEMINAR REPORT
ON
ANALYSIS OF EARTHQUAKE IN THE INDIA AND ITS EFFECT
BY
MOHD RAISH ANSARI
MASTER OF TECHNOLOGY
IN
CIVIL STRUCTURAL ENGINEERING
BABU BANARASI DAS UNIVERSITY, LUCKNOW
AFFILIATED TO
UNIVERSITY GRANTS COMMISSION (U.G.C)
DEPARTMENT OF CIVIL ENGINEERING
BBDU
Submitted to-Mr. Mohd Afaque Khan
2. ACKNOWLEDGEMENT
I would like to place on record my deep sense of gratitude to assistant professor
Mr. Mohd Afaque Khan, from department of CIVIL ENGINEERING from
Babu Banarasi Das University, Lucknow
I am extremely thankful to Mr. Mohd Afaque Khan for valuable
suggestions and encouragement.
I also gratefully acknowledge the help and support of other faculty members
of the department and in completion of the report.
3. CERTIFICATE
I hereby certify that I have completed seminar report on Analysis of
Earthquake in the india and its effect of the requirements for the award
of Master of Technology in Civil Structural Engineering.
The matter presented in this Report has not been submitted by me for the
award of any other degree elsewhere.
4. CONTENT
TOPICS PAGE.NO
1.0 INTRODUCTION………………………………………………….01
1.1 Cause of Earthquake…………………………………………………….02
1.2 Type of Earthquake……………………………………………………..02
1.3 Measurement of Earthquake …………………………………................04
1.4 Background on Earthquake Magnitude and Intensity…………………..05
2. ANALYSIS OF EARTHQUAKE IN INDIA AND EFFECT.06
2.1 CUTCH EARTHQUAKE OF 1819…………………………………….06
2.2 ASSAM EARTHQUAKE OF 1897…………………………………….06
2.3 BIHAR - NEPAL EARTHQUAKE OF 1934…………………………..07
2.4 KOYNA EARTHQUAKE OF 1967…………………………………….08
2.5 BIHAR - NEPAL EARTHQUAKE OF 1988…………………………..08
2.6 UTTARKASHI EARTHQUAKE OF 1991…………………………….08
2.7 KILLARI (LATUR) EARTHQUAKE OF 1993……………………….09
2.8 JABALPUR EARTHQUAKE OF 1997………………………………..10
3. EFFORTS BY THE GOVERNMENT OF INDIA……………11
3.1 ROLE OF THEARMED FORCES……………………………………..12
3.2 MEDICAL RELIEF…………………………………………………….13
3.3 RESTORATION OF INFRASTRUCTURE…………………………...13
3.4 RESCUEAND RELIEF INANDHRA PRADESH…………………….14
4 PREDICTION OF EARTHQUAKE IN INDIA 2017..............15
5. ABSTRACT
India has a very high frequency of great earthquakes (magnitude greater than
8.0); for instance, during 1897 to 1950, the country was hit by four great
earthquakes. However, the frequency of moderate earthquakes (magnitude 6.0
to 7.0) in the country is rather low. Moderate earthquakes create awareness and
lead to improvements in construction at a low human cost. We have not had a
earthquake of magnitude greater than 7.0 in the last 40 years. Also, we have also
not seen earthquake shaking intensity of more than VIII or IX in the last 40
years. And finally, except the Jabalpur earthquake (1997), the other recent
moderate earthquakes have not hit any of the large cities.
This has led to complacence in our earthquake preparedness. We now have
orders of magnitude higher levels of man-made construction and a significantly
larger population than what we had at the time of great earthquakes of 1897,
1934, or 1950; hence, we are that much more vulnerable to earthquake disasters.
6. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 1
1.0 INTRODUCTION
An earthquake is the shaking of the surface of the Earth, resulting from the
sudden release of energy in the Earth's lithosphere that creates seismic waves.
Earthquakes can range in size from those that are so weak that they cannot be
felt to those violent enough to toss people around and destroy whole cities.
The seismicity or seismic activity of an area refers to the frequency, type and
size of earthquakes experienced over a period of time.
An earthquake also known as a quake, tremor or temblor.
At the Earth's surface, earthquakes manifest themselves by shaking and
sometimes displacement of the ground. When the epicenter of a large
earthquake is located offshore, the seabed may be displaced sufficiently to cause
a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic
activity.
In its most general sense, the word earthquake is used to describe any seismic
event
India had a number of the world's greatest earthquakes in the last century. In
fact, more than 50% area in the country is considered prone to damaging
earthquakes. The northeastern region of the country as well as entire Himalayan
belt is susceptible to great earthquakes of magnitude more than 8.0.
The main cause of earthquakes in these regions is due to the movement of the
Indian plate towards the Eurasian plate at the rate of about 50 mm per year.
Besides the Himalayan region and the Indo-Gangetic plains, even the peninsular
India is prone to damaging earthquakes as clearly illustrated by the Koyna
(1967), Latur (1993), and the Jabalpur (1997) earthquakes. Indian earthquakes
have shown some remarkable features which have implications on strategies for
reducing earthquake disasters in the country.
This report attempts to provide an overall perspective of past Indian earthquakes
and the interesting features of the same.
7. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 2
1.1 Cause of Earthquake
There are two main causes of earthquakes.
They can be linked to explosive volcanic eruptions; they are in fact very
common in areas of volcanic activity where they either proceed or
accompany eruptions.
They can be triggered by Tectonic activity associated with plate margins and
faults. The majority of earthquakes worldwide are of this type.
An earthquake can be likened to the effect observed when a stone is thrown into
water. After the stone hits the water a series of concentric waves will move
outwards from the center. The same events occur in an earthquake. There is a
sudden movement within the crust or mantle, and concentric shock waves move
out from that point. Geologists and Geographers call the origin of the
earthquake the focus. Since this is often deep below the surface and difficult to
map, the location of the earthquake is often referred to as the point on the Earth
surface directly above the focus. This point is called the epicentre.
The strength, or magnitude, of the shockwaves determines the extent of the
damage caused. Two main scales exist for defining the strength, the Mercalli
Scale and the Richter Scale.
Earthquakes are three dimensional events, the waves move outwards from the
focus, but can travel in both the horizontal and vertical plains. This produces
three different types of waves which have their own distinct characteristics and
can only move through certain layers within the Earth. Lets take a look at these
three forms of shock waves.
1.2 Type of Earthquake
Earthquakes are usually classified on the following bases:
(a) Cause of origin.
(b) Depth of focus.
(c) Intensity and magnitude of earthquake.
8. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 3
(a) Cause of Origin:
On the basis of the causes of earthquake, they are classified as:-
Tectonic:- Tectonics provides a framework for understanding
the earthquake and volcanic belts that directly affect much of the global
population
Non-tectonic earthquakes:- Non- Tectonics not provides a framework for
understanding the earthquake and volcanic belts that directly affect much
of the global population
(b) Depth of focus:
As we know, the instrument designed to detect seismic waves is called
seismometer and the seismograph is a seismometer to record the earth vibration.
This record of earth vibration is known as seismogram. It has now become
possible to estimate the depth of focus of an earthquake by analyzing
seismograms. On the basis of the depth of focus, earthquakes are classified as:
Surface-earthquakes:- Surface-earthquakes are those in which the depth
of the focus is less than 10,000 metres.
Shallow-focus earthquakes or normal earthquakes:- The earthquakes
with the hypocentre at a depth of 10 to 50 kms are known as shallow-
focus earthquakes.
Intermediate-focus earthquakes:- When the earthquake is originated at
a depth of 50 to 300 Kms, it is called intermediate- earthquake
Deep-focus earthquakes:- The deep-focus earthquakes or the plutonic
earthquakes are those with hypocenters located at depths more than 300
kms. Majority of the deep focus earthquakes originate between 500 and
700 kms.
Shallow-focus earthquakes constitute about 85 percent of all the earthquakes
and the intermediate and deep-focus earthquakes account for 12 and 3 percent
respectively of all the earthquakes. Thus it is seen that the intermediate and
deep-focus earthquakes together account for only 15 percent of the earthquakes.
9. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 4
(c) Intensity and Magnitude of Earthquakes
As we know, the tremors caused by earthquake may be so feeble and
imperceptible that they can only be registered by highly sensitive instruments
and may be so vigorous to cause large scale devastation. The strength of an
earthquake can be measured either by its intensity or by its magnitude.
Intensity of an earthquake is a measure of the degree of damage and destruction
it can cause. These effects can be observed without the help of any instrument.
It is also a fact that intensity of an earthquake diminishes outwards from the
epicenter.
Therefore places in which the earthquake has manifested itself with equal
intensity are contoured with - a line known as 'isoseismal'.
Areas with one and the same intensity of earthquake restricted by isoseismal
lines are known as isoseismal areas.
There is a number of disadvantages in using intensity as a measure of the
strength of a particular earthquake, some of the important disadvantages are as
follows:
The strength of an earthquake decreases with distance from its epicentre.
Thus different degree of damage occurs at different distances for the
same earthquake.
The degree of damage depends much on the geological characteristics of
a particular area as well as the type of construction, population-density
etc.
1.3 Measurement of Earthquake
There are the two main instruments used to measure the strength of earthquakes
which is given below:-
Seismograph.
Seismoscope.
Seismometer.
10. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 5
Seismograph:- its main component is a hanging mass as heavy as 1,000
pounds that is connected to a pen, and this large pendulum is situated just
above a paper surface.
Seismoscope:- It is a simple instrument that measures the time that an
earthquake takes place. The seismograph records the motion of the
ground during an earthquake.
Seismometer:- It is an instrument that measures motion of the ground,
caused by, for example, an earthquake, a volcanic eruption, or the use
of explosives. Records of seismic waves allow seismologists to map the
interior of the Earth and to locate and measure the size of events like
these.
1.4 Background on Earthquake Magnitude and Intensity
When reviewing the past earthquakes it is important to have the correct
perspective on earthquake magnitude and earthquake intensity: two terms often
misunderstood. Earthquake magnitude is a measure of the size of the earthquake
reflecting the elastic energy released by the earthquake.
It is referred by a certain real number on the Richter scale (e.g., magnitude 6.5
earthquake). On the other hand, earthquake intensity indicates the extent of
shaking experienced at a given location due to a particular earthquake. It is
referred by a Roman numeral (e.g., VIII on MSK scale). To draw a parallel,
consider a 100W light bulb used for illumination purposes. It dissipates energy
of 100 Watts. However, the brightness of light at different distances from it,
referred in candlelights, is different. The former is magnitude and the latter is
intensity. Whether or not there is adequate light at a given location to enable one
to read a book, depends on what is the intensity of light at that location;
intensity itself depends on the magnitude of bulb (i.e., Watts) and the distance
of the bulb from the location under consideration. Similarly, intensity of
shaking at a location depends not only on the magnitude of the earthquake, but
also on the distance of the site from the earthquake source and the geology /
geography of the area.
11. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 6
2. ANALYSIS OF EARTHQUAKE IN INDIA AND EFFECT
The earthquake which came in India in the past whose detail are given below:-
Indian subcontinent has suffered some of the greatest earthquakes in the world
with magnitude exceeding 8.0. For instance, in a short span of about 50 years,
four such earthquakes occurred: Assam earthquake of 1897 (magnitude 8.7)
(Oldham, 1899), Kangra earthquake of 1905 (magnitude 8.6) (Middlemiss,
1910), Bihar-Nepal earthquake of 1934 (magnitude 8.4) (GSI, 1939), and the
Assam-Tibet earthquake of 1950 (magnitude 8.7) (CBG, 1953). Significance of
such earthquakes can be gauged from the fact that in his famous book on
Engineering Seismology.
(Richter, 1958) Professor C.F. Richter (known for the Richter scale) devotes an
entire chapter entitled “Some Great Indian Earthquakes” to introduce the nature
of earthquakes: the book has no similar chapter for great earthquakes in other
regions of the world. Fortunately, since 1950.
2.1 CUTCH EARTHQUAKE OF 1819
This 8.3 magnitude earthquake took place on the west coast of India on June 16,
1819. It caused ground motion which was perceptible as far as Calcutta. The
earthquake caused a fault scarp of about 16 mile long and about 10 foot high
which was later named as "Allah Bund".
In fact, this earthquake provided the earliest "clear and circumstantially
described occurrence of faulting" during earthquakes (Richter, 1958). Cutch
being far away from the plate-boundaries, this earthquake is one of the largest
intra-plate earthquakes to have occurred in the world.
2.2 ASSAM EARTHQUAKE OF 1897
The Assam earthquake of June 12, 1897 (magnitude 8.7) caused severe damage
in an area of about 500 km radius (as against the area of about 10 km radius that
sustained severe damage in the Latur earthquake!). The earthquake caused
extensive surface distortions in the area. There were clear instances of upthrow
of objects caused by the shaking, this implied that the maximum vertical
acceleration during the earthquake exceeded 1.0g.
The earthquake caused extensive liquefaction in the alluviated plains of
Brahmaputra.
12. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 7
Very extensive damage to rail tracks and bridges took place. The shaking in the
meizoseismal area was so severe that it provided a model for specifying the
modified Mercalli intensity of XII.
The buildings in the area around Shillong consisted of three types: stone
buildings; ekrabuilt buildings which consisted of wooden framework with walls
of san grass covered in plaster; and the timber plank buildings built on "log hut"
principle, having a wooden framework covered with planks, and resting
unattached on the ground. All the stone buildings were leveled to the ground
About half of the ekra-type buildings were leveled to the ground particularly
due to the stone chimneys (stone or brick chimneys projecting out of the
buildings are easy casualties in earthquakes). The plank buildings were in
general undamaged. Damage caused by this earthquake led to the development
and adoption of Assam-type houses with the active involvement of the then
government and with the help of Chinese carpenters and craftsman.
2.3 BIHAR - NEPAL EARTHQUAKE OF 1934
This 8.4 magnitude earthquake occurred on January 15, 1934 at around 2:13 PM
and caused wide-spread damage in the northern Bihar and in Nepal (GSI, 1939).
The number of deaths was relatively low: about 7,253 in India and 3,400 in
Nepal since most people are outdoors in the winter afternoon.
Serious damage was caused in an area of about 300 km mean radius. The
earthquake caused a maximum intensity of X in 125 km long and 30 km wide
area. Besides, two distant areas both located about 160 km from the main
damage area suffered intensity of X; these were Kathmandu valley in the north
and Munger in the south; this happened due to peculiar geology of that region
(e.g., Richter, 1958). Most buildings tilted and slumped bodily into the ground
in an area of about 300 km long and of irregular width (sometimes exceeding 65
km); this area was termed as the "slump belt". The area of slump belt underwent
extensive liquefaction. At places, six feet high embankments became level with
the surrounding area. On the other hand, the depth of lakes, ponds, borrow
areas, and other depressions became lower. The area of slump belt was
associated with fissuring and emission of sand and water caused by liquefaction
and formation of sand boils. One of the fissure was 15' deep, 30' wide, 900'
long.
13. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 8
2.4 KOYNA EARTHQUAKE OF 1967
This was a magnitude 6.5 earthquake that took place close to the 103 metre
concrete gravity dam at Koyna (Berg et al., 1969). Prior to this earthquake, the
area used to be considered aseismic. However, after the construction of dam and
filling up of reservoir in 1962, the seismic activity increased significantly. The
main shock of December 10, 1967 caused widespread damage, killing about
200 persons and injuring more than 1500 persons. The maximum shaking
intensity was assigned as VIII on the MM scale. This earthquake provides one
of the important instances of the reservoir-induced seismicity. A strong motion
accelerograph located in the gallery at mid-height of the dam recorded peak
vertical acceleration of 0.36g and peak horizontal acceleration of 0.45g and
0.39g. The dam, designed for a seismic coefficient of 5% g by the pseudo-static
analysis, performed quite well with only nominal damage to the dam.
This earthquake lead to the revision of Indian seismic zone map wherein the
area around Koyna was brought in zone IV from zone I, and seismic zone for
Bombay was upgraded from zone I to zone III.
2.5 BIHAR - NEPAL EARTHQUAKE OF 1988
This magnitude 6.6 earthquakes shook northern Bihar and Nepal on August 21,
1988 at 04:39 hours (e.g., GSI, 1993; Jain, 1992; Jain et al., 1991,
Subramanyam, Thakkar.
About 1004 persons died (282 in India and 722 in Nepal) and more than 16,000
injured; casualties were significantly reduced since in the summer time most
people sleep outdoors. Significant damage was caused in three distinct regions:
the area near the epicenter, and the areas around Munger (India) and Bhaktapur
(near Kathmandu in Nepal); this damage pattern due to peculiar geology of the
area is exactly similar to that of the 1934 Bihar-Nepal earthquake.
2.6 UTTARKASHI EARTHQUAKE OF 1991
An earthquake of magnitude 6.6 shook the districts of Uttarkashi, Tehri, and
Chamoli in the state of Uttar Pradesh on October 20, 1991 at 2:52 hours (GSI,
1992; Jain et al., 1992). The death toll was estimated to be around 768 persons,
with about 5,066 injured. The area has one of the lowest population density in
the state, and hence the rather low number of deaths and injuries.
14. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 9
The maximum intensity of IX on the MM scale was assigned to an area of about
20 square km. This earthquake provided excellent ground motion records
(acceleration versus time history) in the area (e.g., Jain and Das, 1993):
maximum peak ground acceleration of about 0.31g was recorded at Uttarkashi.
Ground motion records showed that in the Himalayan region, the motion has
significantly higher amount of high-frequency contents. During the earthquake,
collapse of houses with R.C. roof slab supported on weak random-rubble stone
masonry clearly demonstrated the disastrous results of often neglected walls and
columns vis-à-vis slabs and beams. Several 4-storey buildings in Uttarkashi (not
designed or detailed by engineers) with R.C. frame and stone infills sustained
the earthquake rather well! This was due to the presence of significant number
of infills from foundation to the top of the building which acted as shear walls.
From such examples, one could easily and incorrectly get carried away to
conclude that all R.C. buildings in general are good for earthquakes. To sober
one down, top two storeys of the 3- storey State Bank of India R.C. frame
building collapsed (Fig. 6); clearly illustrating the disaster that R.C. buildings
can cause if not done right.
An important bridge on the strategically important Uttarkashi-Harsil route
collapsed; causing disruption of traffic for several days.
2.7 KILLARI (LATUR) EARTHQUAKE OF 1993
On September 30, 1993 a magnitude 6.4 earthquake shook the area near village
Killari in Latur district killing about 8,000 persons (GSI, 1996; Jain et. al, 1994;
Seeber et al., 1993, 1996).
The maximum intensity of shaking was about VIII to IX. Until this earthquake
the area was considered non-seismic and placed in the lowest seismic zone
(zone I) by the Indian code (IS:1893-1984). Most of the damage was contained
in a relatively small area of 20 km x 20 km.
The affected area did not have any modern towns, modern buildings or major
industries. In some of the villages more than 30% of the population was killed.
This earthquake will be known for outstanding rescue, relief and rehabilitation
carried out for any earthquake in recent Indian history; perhaps outstanding by
even international standards.
15. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 10
2.8 JABALPUR EARTHQUAKE OF 1997
This earthquake is the first moderate earthquake (magnitude 6.0) to have
occurred close to a major Indian city in recent times: Jabalpur has a population
of about 1.2 million people (Jainet al., 1997; Rai et al., 1997). It provided some
indication of what type of seismic performance to expect out of modern Indian
constructions. The maximum intensity was upto VIII (in a very small area);
most parts of Jabalpur town experienced shaking intensity of VI and VII.
Numerous R.C. frame buildings of three-four storeys with brick infills
performed well even though these may not have been designed for earthquake
forces: this is because the brick infill walls acted as shear walls and took most
of the seismic loads in such buildings. On the other hand, several similar
buildings but with open-first storey (i.e., few or no brick infills in the ground
storey) showed heavy distress to the ground storey columns (Figs. 7 and 8):
such buildings could have collapsed due to failure of ground storey columns if
the shaking had been stronger or lasted for a longer duration.
Another interesting feature of the earthquake was heavy damage to a very large
n.8umber of two and three storey brick-masonry residential buildings belonging
to different government agencies: e.g., the ordnance factories, Department of
Telecom, railways, etc. Such Damage to mumtys (staircase projection above the
building roof) in such houses posed a major problem. Most medium and large
towns in the country now have a huge inventory of R.C. frame buildings with
open first storey (to accommodate vehicle parking), and two-three storey brick
masonry housing units; such buildings could cause major disasters in future
earthquakes affecting Indian cities.
16. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 11
3. EFFORTS BY THE GOVERNMENT OF INDIA
In the Indian government, natural disasters are handled by the Union Ministry
of Home Affairs. The Indian Tri-Services _Indian Army, Indian Air Force, and
Indian Navy_ were pressed into service to provide emergency support. The
Ministry of Home Affairs coordinated the responsibilities, the mobilization and
dispatch of resources, and the logistics.
The governments of the affected states and the administrations of the affected
UTs delivered the relief material to the earthquake-affected areas with
assistance from railways and helicopter services _MHA 2005.
The immediate relief was facilitated by the Government of India through the
release of grants from the National Calamity Contingency Fund, which
contributed Rs. 700 crores _US $156 million_ to the affected states and UTs.
The state grants consisted of Rs. 250 crores _US $56 million_ to Tamil Nadu
and Rs. 100 crores _US $22.2 million each to Andhra Pradesh and Kerala. The
UT grants consisted of Rs. 200 crores US $44.4 million_ to the A&N islands
and Rs. 35 crores US $7.8 million_ to Pondicherry.
To facilitate relief work, two regional logistics coordination centers _one at
Kolkata and another at Chennai_ and eight relief supply hubs _Bhuj,
Ahmedabad, Bombay, Bhopal, Bangalore, Madras, Bhubaneswar, and Calcutta_
were established in various parts of the country. In all, 881 relief camps were
opened, and about 604,335 people were housed in them. There were 231 relief
camps in Kerala, housing 171,491 people; 65 camps in Andhra Pradesh,
housing 34,264 people; 48 camps in Pondicherry, housing 45,000 people; 412
camps in Tamil Nadu, housing 309,379 people; and 125 camps in the A&N
islands, housing 44,201 people _Figure 1_. About 12,397 5-person tents and
2,318 10-person tents were used; most of the tents were used in the A&N
islands.
As of 1 March 2005, about 19,670 metric tons of relief material _including
17,500 metric tons to the A&N islands_ were moved. All relief material was
transported by the Indian Air Force, Indian Railways, and some State Road
Transport Corporations to the affected areas free of cost, if the consignees were
the relief commissioners or district magistrates and if the relief material had
been donated.
17. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 12
In summary, there was an overwhelming response by the people of India to help
those who were affected by the tsunami, and the entire postdisaster situation
was managed with national resources. In fact, India even managed to offer
limited assistance to Indonesia, Sri Lanka, and the Maldives.
3.1 ROLE OF THEARMED FORCES
While it was easy to access the affected coastline in mainland India, accessing
the affected A&N islands was a challenge because _a_ the A&N islands are
Indian security zone areas for historical reasons, and _b_ there are 572 islands
spread over a 1,200-km area _in particular, the islands affected by the tsunami
were themselves spread over 800 km_. Hence, the Indian Tri-Services had a
major role to play immediately after the event. In addition, the Indian Coast
Guard and the Central Paramilitary Force were pressed into service. The
immediate tasks for the armed forces were
Rescuing stranded persons and evacuating them to safer places.
Creating temporary shelter and relief camps;
Disposing of dead bodies.
Ensuring adequate supplies of food, water, and medicine;
Restoring basic lifeline infrastructure _e.g., electrical power, water, and
communications.
Ensuring the safety of the tribal population in the A&N islands. To
achieve this,
The armed forces launched Operation Sea Waves, in which the relief supplies
were transported by naval ships in association with small local boats, since
jetties were damaged and unfit for berthing heavy cargo ships. The Indian Air
Force helicopters airdropped relief materials in remote areas. Two ships were
also deployed in Tamil Nadu and Pondicherry for relief operations. Rescue was
a major effort; in all, over 28,734 people were rescued—9,284 in the A&N
islands, 9,500 in Tamil Nadu _including 1,000 people stranded at the
Vivekananda Memorial in Kanyakumari_, and 9,950 in Kerala. About 647,000
people were moved to safer places—about 630,000 on the mainland and about
17,000 in the A&N islands. The effort in the A&N islands included a special
intervention by the Ministry of Civil Aviation.
18. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 13
Government of India, to operate 64 special flights from Port Blair _in the A&N
islands_ to mainland India from 27 December 2004 through 1 January 2005 to
evacuate over 6,318 people, including tourists. This large-scale movement of
people was made possible by the deployment of over 20,907 troops _8,300 from
the Indian Army, 5,500 from the Indian Navy, 3,000 from the Indian Air Force,
2,000 from the Indian Coast Guard, and 2,107 from the Central Paramilitary
Force_. This movement involved 22 naval ships, 11 coast guard ships, 12
airplanes, and 17 helicopters.
3.2 MEDICAL RELIEF
Immediately after the event, medical teams were sent to the states: 158 to
Andhra Pradesh, 581 to Tamil Nadu, 233 to Kerala, and 87 to Pondicherry. The
armed forces established 18 medical camps with more than 20 medical teams in
the areas affected by the tsunamis. A 120-bed hospital was established onboard
the INS Magar. All ships of the Indian Navy and Indian Coast Guard deployed
for search and rescue were provided with medical facilities. About 114 doctors
_including 32 physicians, 6 psychiatrists, 41 general duty medical officers, and
16 public health specialists_, 104 nurses and paramedics _including
fumigators_, and 10 medical teams from the Indian Army and Indian Navy were
deployed by the Indian Ministry of Health and Family Welfare. A number of
teams were constituted and kept on hand, including a team of psychiatrists in a
number of medical institutions supported by the Government of India so that the
team could be dispatched on short notice. A total of 27,537 people were
attended to by the medical teams detailed by the Government of India.
Emergency medicine worth Rs. 2 crores _US $444,000_ was dispatched to the
A&N islands, Kerala, and Pondicherry; and emergency medicine worth Rs. 1
crore _US $222,000_ was dispatched to Tamil Nadu.
3.3 RESTORATION OF INFRASTRUCTURE
Andhra Pradesh and Kerala suffered relatively less damage to infrastructure,
andhence the restoration of infrastructure was rapid. However, in Tamil Nadu
and the UTs of the A&N islands and Pondicherry, the damage was extensive.
Electrical power in the A&N islands was restored by 745 diesel generator sets,
and arrangements were made to move other large generator sets into the islands.
Engineering teams were sent to Tamil Nadu, Pondicherry, and the A&N islands
to restore power.
19. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 14
The mainland area did not suffer a telecommunications crisis, because of
redundancy available in cell phone services as well as land lines. Also, the
damage extended only along a small coastal strip of land. However, the
situation in the A&N islands was not so simple—there are not enough land line
exchanges, and there is only one _government owned _ cell phone service
provider. Hence, there were more difficulties owing to poor communications in
the A&N islands, particularly in the islands south of Port Blair.
The situation was aggravated because of the full or partial outage of power
generation in many islands and the unavailability of technical personnel to
restore the generation facilities. The administrators controlling the relief
operations _including the armed forces_ communicated via satellite phones.
Ham radio and Immersat and VSAT phones were also used in the immediate
aftermath of the earthquake and tsunamis.
3.4 RESCUEAND RELIEF INANDHRA PRADESH
Andhra Pradesh has about 500 villages within 5 km of the coastline, with a
population of 1,163,000. Andhra Pradesh was affected on a very moderate scale,
as compared with Tamil Nadu. Along a coastline of 1,030 km, a total of 301
villages were affected in 9 coastal districts: Srikakulam, Vizianagaram,
Visakhapatnam, East Godavari, West Godavari, Krishna, Guntur, Prakasam,
and Nellore. The death toll in Andhra Pradesh was 106, with 4 people missing.
Also, 1,254 houses collapsed or were heavily damaged, and 303 were partly
damaged. The cattle loss was 86 head. The ingress of seawater damaged.
20. DEPARTMENT OF CIVIL ENGINEERING, BBDU LUCKNOW Page 15
4 PREDICTION OF EARTHQUAKE IN INDIA
An image of a letter addressed to Prime Minister Narendra Modi predicting an
earthquake in the Indian Ocean before December, 31, 2017 has gone viral on
social media. The letter signed by Kerala based physics professor Babu Kalayil
on the letter head of B.K. Research Association for E.S.P makes some startling
claims. The letter with several spelling errors and grammatical mistakes claims
11 countries including India will be impacted and “Seeshma storm will strike
the coast with speeds of 120-180 km with mighty power”. Kalayil claims to
have made this observation on August 20, 2017 with the help of ESP or extra
sensory perception.