Earthquakes occur most often along geologic faults, narrow zones where rock masses move in relation to one another. Earthquakes are sometimes caused by human activities, including the injection of fluids into deep wells, the detonation of large underground nuclear explosions, the excavation of mines, and the filling of large reservoirs. In an earthquake, huge masses of rock move beneath earth ’s surface and cause the ground to shake
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Earthquakes occur constantly around the world
Often they are too small for people to feel at all, but some earthquakes are massive
They can cause great destruction. The sudden shaking of the ground that occurs when masses of rock change position below earth’s surface is called an earthquake Earthquakes are produced when some form of… Furthermore, earthquake intensity, or strength, is distinct from earthquake magnitude, which is a measure of the amplitude, or size, of seismic waves as specified by a seismograph reading.
Earthquakes generate four principal types of elastic waves Two, known as body waves, travel within the earth, whereas the other two, called surface waves, travel along its surface.
