Earthquake is a shaking of the ground caused by sudden

movement of the tectonic plates under ground

…as the tectonic plates on the earth’s crust move they often hit each other at the edges. The tectonic plates are sliding past each other.

SAN FRANCISCO 1906

5:12am – April 18,1906

Ranked as one of the worst natural disasters in the history of U.S.A and one of the most significant earthquakes of all times.

The American earthquake affected 375,000 square miles , half of which were

in the Pacific ocean.

Matt

Information found:

On Google

From Massey