An earthquake is a sudden, rapid shaking of the earth caused by the breaking and shifting of rock beneath the earth's surface.
The formation of earthquakes is the collision or shifting of rocks along the earth's surface layer. This is caused by convergent boundaries colliding with one another and the pressure of the rocks that cannot sustain the force of the shifting, causing them to shift or cracks.
Landslides and Mudflows
Thunderstorms and Lightning
Nuclear Power Plants
If in a Vehicle
If Trapped Under Debris
From 1975-1995 there were only four states that did not have any earthquakes. They were: Florida, Iowa, North Dakota, and Wisconsin.
Contact your local or Installation's Office of Emergency Management for more information.