Answer:
1. The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter. Sometimes an earthquake has foreshocks.
2. Earthquake magnitude is a measure of the “size,” or amplitude, of the seismic waves generated by an earthquake source and recorded by seismographs. ... Richter first applied his magnitude scale to shallow-focus earthquakes recorded within 600 km of the epicentre in the southern California region.
3. Differentiate active and inactive faults
Active faults are structure along which we expect displacement to occur. ... Inactive faults are structures that we can identify, but which do no have earthquakes.
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