This document provides information about different types of natural disasters including those that occur on land, in water, and in air. It discusses disasters such as earthquakes, volcanic eruptions, floods, tsunamis, tornadoes, and others. It describes their causes and effects, highlighting that while natural disasters cannot be controlled, understanding them better can help minimize damage through improved disaster management.

1. Natural DisastersGroup Members:-Tahira Jabbar Shaikh (4377)Shahid Hussain (4422)Sana Laiq Ali (4384)Kamran Mehmood (4424)Muhammad Muzammil Ghayas (4338)Course Instructor:-Miss Mehvish Saleem

2. Disaster:-An occurrence causing widespread destruction and distress.

3. A catastrophe.

4. A grave misfortune.Definitions

5. A natural disaster is an event caused by natural forces.

6. It often has a significant effect on human populations.

7. Typically the human populations either are displaced (left homeless) or killed.Natural Disasters

8. Have economic and emotional effect on people.

9. Directly affect life and property.Contd…

10. Natural disasters occurs in all three broadareas:Land

11. Air

12. WaterOccurrence & Affects of Natural Disasters

13. There are 4 kinds of natural disasters whichoccurs on land:Earthquakes

14. Volcanic Eruptions

15. Lahars

16. AvalanchesDisasters on Land

17. Earthquake is a sudden shock of earth’s crust.

18. The underground point of origin is called the focus.

19. The point directly above the focus is called the epicenter.

20. They are measured with a seismometer.

21. The scale is called the Richter Scale.Earthquakes

22. An earthquake that occurs after the main shock.

23. It occurs in the same area or region of the main shock.

24. Its magnitude is relatively smaller than the main shock.The Aftershocks

25. If the magnitude of an after shock is greaterthan the main shock:After shock is designated as the main shock.

26. The main shock is redesignated as the fore shock.Designation of Main Shock & The After Shock

27. Earthquake itself does not kill any one.

28. Usually the secondary events kill the people.

29. Secondary events include:

30. Tsunami

31. Building Collapse

32. Fires