About 3,000 people died from the earthquake, on the San Andreas Fault, and resulting fire. Earthquakes are caused by shifts in the outer layers of Earth—a region called the lithosphere.

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When tectonic plates move, it also causes movements at the faults. Do camels really have water in their humps? You will receive a verification email shortly. NY 10036.

A diagram of Earth's layers. But a draft map released by the U.S. Geological Survey in 2014 reveals that 42 out of the 50 states have a moderate to high seismic hazard risk. - Types, Causes & Effects, What is the Epicenter of an Earthquake? As a member, you'll also get unlimited access to over 79,000 Not sure what college you want to attend yet? What causes earthquakes in San Francisco? An earthquake occurs when the two plates that are stuck suddenly break apart. courses that prepare you to earn And though the plate boundary is stuck, the plate itself keeps moving and pulling the rest of the plate with it. 2011 — Japan, Magnitude: 9.0. The tension built up from a slipping fault also needs an outlet once the tension is released, but this gets sent through the earth as waves of energy known as seismic waves. The ground slowly gets deformed as it sticks, and then 'rebounds' back into shape once it breaks free. Earthquakes are known for being deadly natural disasters. Please deactivate your ad blocker in order to see our subscription offer. A large earthquake is often followed by aftershocks, which are smaller quakes that result from the crust adjusting to the main shock.