The document defines and describes four natural calamities: earthquake, tornado, tsunami, and flood. Earthquakes are sudden violent ground shaking caused by crustal or volcanic movements. Tornadoes are destructive rotating funnel clouds under large storms. Tsunamis are large sea waves caused by earthquakes or other disturbances. Floods occur when rivers receive excess water from rain or disasters, causing overflow onto surrounding land.

1. Natural Calamities

2.  Earthquake
 Tornado
 Tsunami
 Flood

3. Earthquake
A sudden violent shaking of the ground,
typically causing great destruction, as a
result of movements within the earth's
crust or volcanic action.

4. Definition Of TornadoTornado
A mobile, destructive vortex of violently
rotating winds having the appearance of a
funnel-shaped cloud and advancing beneath a
large storm system.

5. Tsunami
a long, high sea wave caused by
an earthquake or other
disturbance.
"the loss of human lives from this
latest tsunami is staggering"

6. Flood
Sometimes a river receives a lot of
extra water either from lots of rain or
other natural disasters. When this
happens, the water overflows from its
normal path in the river bed and
possibly onto dry land. This is called
a flood.

7. Thanks