Hi All. It appears that the Earth might be the cause of some “moonquakes” so maybe the moon might be able to cause earthquakes. However the problem still remains the same. Where will that quake occur, how big will it be and when will it occur? So far the answer to those questions still elude the scientists. Take Care…Don in creepy town

The lunar landers for Apollo 11 through 16 carried seismometers, the same type of instruments that measure earthquakes on Earth, designed to be left behind and to continue to radio back data after the astronauts left. Apollo 11 left a prototype that failed after a month, and Apollo 13, which was almost lost when its oxygen tank exploded, never made it to the lunar surface. But the four other seismometers, from Apollo 12, 14, 15 and 16, recorded some 12,500 seismic events through 1977, when NASA turned the network off.

Nearly identical squiggles emerged from the Moon seismographs over and over, indicating that certain parts of the Moon's interior broke repeatedly in the same way, almost like someone cracking his knuckles. Dr. Nakamura and other scientists counted 108 of these regions, which they called nests. The rate of moonquakes seemed to ebb and flow on every 27 days, the time it takes the Moon to circle the Earth, suggesting that they were caused by the pull of tidal forces.

Almost all of the deep moonquakes originated on the near side of the Moon, the side that always faces the Earth. That meant either the structure of the far side is different and does not experience moonquakes or moonquakes do occur, but the waves dissipate when they hit a still molten core.

• Moonquakes