Most of our detailed information on the Moon's interior comes from seismic data obtained from equipment left on the lunar surface by astronauts. These measurements indicate only very weak moonquakes deep within the lunar interior. Even if you stood directly above one of these quakes, you would not feel the vibrations. The average moonquake releases about as much energy as a firecracker, and no
large quakes have ever been detected. This barely perceptible seismic activity confirms the idea that the Moon is geologically dead. Even so, researchers can use these weak lunar vibrations to learn about the Moon's interior.
a. Astronauts left equipment on the moon to be used on future Moon explorations.
b. We know the Moon is geologically dead because recent studies show almost no seismic activity.
c. If you were on the Moon during a moonquake, you would not feel vibrations because of lack of energy and atmosphere.
d. Moonquakes on the Moon can be equated with earthquakes on Earth in terms of causes and severity.
b
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