Natural disaster

2. NATURAL DISASTER
ABIN MUHAMMED .M

3. DISASTER:
 A natural disaster is a major adverse event resulting from natural
processes of the earth.
 A natural disaster can cause loss of life or property damage and
typically leaves some economic damage in its wake.
 Natural disaster claim the lives of thousands of people in the world
every year.
 Disaster can leave lasting damage, which can require years to repair.
 It’s hard to say which natural disaster is the most deadly.

4.  Tsunami
 Earthquake
 Flood
 Wildfire
 Landslide
TYEPES OF DISASTER

5. TSUNAMI
 Tsunami means harbour wave and is caused by the displacement of
a large body of water normally an ocean or a large lake. Tsunamis are
giant waves caused by earthquakes or volcanic eruptions under the
sea.
The biggest tsunami ever happened at Lituya Bay, Alaska on July
9,1958. the great tsunami was around 150 meters tall.

6.  The tsunami caused by 2004 Indian Ocean earthquake, is the 6th
deadliest Natural disaster in recorded history with a death toll of
230,210 – 280,00.
 Tsunami are generated by any large, impulsive displacement of the
sea level
 The most common cause of a tsunami is sea floor uplift associated
with an earthquake.

7. EARTHQUAKE
 An earthquake is the result of a sudden release of energy in the
Earth’s crust that creates seismic waves.
They are caused by abnormal movements of the Earth’s tectonic
plates.
 Earthquakes can also trigger landslides and occasionally, volcanic
activity.

8.  They are measured using seismographs.
 The Valdivia earthquake also known as the great Chile an
earthquake is the biggest earthquake ever recorded . It hit Chile on
May 22,1960 with a magnitude of 9.5 and a death toll of around
6000.
 Earthquake are caused by slippage within geological faults.

9. FLOOD
 A flood is a temporary overflow of water that submerges the Land
that is usually dry.
 Flooding may occur as an overflow of water from water bodies,
such as a river, lake or ocean.
 Floods often cause damage to homes and businesses if they are in
the natural flood plains of rivers.

10.  One of the biggest floods in the world is probably the yellow river
in China 1887 which killed between around 900,00.
 Floods can also occur in rivers when the flow rate exceeds the
capacity of the river channel, particularly at bends or meanders in the
waterway.
 The flood flow in urbanized areas constitutes a hazard to both the
population and infrastructure.

11. WILDFIRE
 An uncontrolled fire often occurring in wildland areas, but which
can also consume houses or agricultural resources .
 A wildfire also known as a forest fire, vegetation fire, grass fire,
brush fire or bushfire.
 Fossil charcoal indicates that wildfires began soon after the
appearance of terrestrial plants 420 million years ago.

12.  One of the largest wildfire is the 1910 wildfire.
 They can spread to populated areas and can thus be a threat to
humans and property as well as wildfire.
 Wildfires are among the most common forms of natural disaster in
some regions, including Siberia, California, and Australia.

13. LANDSLIDE
 A landslide is the movement of rock, earth or debris, down a slapped
section of land.
 Landslide are caused by rain, earthquake, volcanoes or other factors
that make the slope unstable.
 The largest landslide in history happened because of Mount
St. Helens 3km of rock moved downhill.

14. PRESENTED BY :
ABIN MUHAMMED. M
CALICUT