Definition Of

Q) What is A MoonQuake?

A) A MoonQuake is a Quake (shake) on the moon.
When the substance of the moon begins to shake, usually as the consequence of a sudden release of energy transmitted as seismic waves, and potentially with great violence, it is called a MoonQuake.

A moonquake is the lunar equivalent of an earthquake (i.e., a quake on the Moon). They were first discovered by the Apollo astronauts. 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. The instruments placed by the Apollo 12, 14, 15 and 16 functioned perfectly until they were switched off in 1977.

According to NASA, there are at least four different kinds of moonquakes:

1) Deep moonquakes (~700 km below the surface, probably tidal in origin)
Meteorite impact vibrations

2) Thermal moonquakes (the frigid lunar crust expands when sunlight returns after the two-week lunar night)

3) Shallow moonquakes (20 or 30 kilometers below the surface)

4) Shallow moonquakes. This type of quake can register up to 5.5 on the Richter scale. Between 1972 and 1977, twenty-eight shallow moonquakes were observed. On Earth, quakes of magnitude 4.5 and above can cause damage to buildings and other rigid structures.

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