An earthquake (quake, tremor or temblor) is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to toss people around and destroy whole cities. The seismicity or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.
CCTV recordings during earthquakes show how sudden and powerful it attacks on the surface of the earth.
CCTV recordings during earthquakes show how sudden and powerful it attacks on the surface of the earth.
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