After the quake pdf

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A quake is the result when the surface of a planet, moon or star begins to shake, usually as the consequence of a sudden release of energy transmitted as seismic waves, and potentially with great violence. An earthquake is a phenomenon that results from the sudden release of stored energy in the Earth’s crust that creates seismic waves. At the Earth’s surface, earthquakes may manifest themselves by a shaking or displacement of the ground and sometimes cause tsunamis, which may lead to loss of life and destruction of property.

The strain becomes so great that rocks give way and fault lines occur. They were first discovered by the Apollo astronauts. The largest moonquakes are much weaker than the largest earthquakes, though they can last for up to an hour, due to the lack of water to dampen seismic vibrations. Information about moonquakes comes from seismometers placed on the Moon by Apollo astronauts from 1969 through 1972.

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