Fill in the Blanks EarthquakesOnline version Complete the sentences with the correct workd using earthquake vocabulary. by Eric Guirado 1 Richter earthquake focus epicenter Alaska fault San Andreas An is a shaking of the ground caused by the sudden breaking and movement of large sections ( tectonic plates ) of the earth's rocky outermost crust . The is the point on the Earth's surface that is directly above the focus . The occurs at the focal depth below the epicenter . The Fault is a continental transform fault that runs a length of roughly 810 miles ( 1 , 300 km ) through California in the United States . In geology , a is a planar fracture or discontinuity in a volume of rock , across which there has been significant displacement along the fractures as a result of earth movement . The magnitude scale is one of a number of ways that have been developed to assign a single number to quantify the energy contained in an earthquake . The largest recorded earthquake in the United States was a magnitude 9 . 2 that struck Prince William Sound , on Good Friday , March 28 , 1964 .
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