10 Strange Secrets Of The Moon
10 Moonquakes Despite being a dead hunk of rock with very little geological activity, the Moon is prone to shaking fits. These earthquake-like tremors are called moonquakes, and there are four different kinds of them. The first three types—deep quakes, vibrations from meteorite impacts, and thermal quakes caused by the Sun’s heat—are relatively harmless. The fourth one, however, can be quite unpleasant. These “shallow” moonquakes can register up to 5.5 on the Richter scale—enough to move large furniture around—and last for a remarkably long 10 minutes....