natural disaster

Earthquake

A shake in the Earth's lithosphere, caused by the release of built up pressure inside the rocks along the fautlines. An aftershock normally occurs.
Earthquake Destruction

Tsunami

A giant wave, normally produced by a seaquake or a volcano erupting under the sea {called a seismic sea wave}
Scariest Japan Tsunami Video Ever!

Monsoon

A strong wind that occurs mostly in south Asia, bringing in rain to water most farmers crops. Most of the rain comes from northeast, around winter.
Effects of Monsoon Season on India (Dispatch)