Moonquakes — “Shrinking Moon is Still Tectonically Active”

Earth from the Moon

 

A 2010 analysis of imagery from NASA’s Lunar Reconnaissance Orbiter (LRO) found that the moon shriveled like a raisin as its interior cooled, leaving behind thousands of cliffs called thrust faults on the moon’s surface. It’s very likely that moonquakes were produced by faults slipping as stress built up when the lunar crust was compressed by global contraction and tidal forces, indicating that the Apollo seismometers recorded the shrinking moon and the moon is still tectonically active, said Thomas Watters, senior scientist in the Center for Earth and Planetary Studies at the Smithsonian Institution.

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