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Moonquakes are much more common than thought, Apollo data suggest

Understanding how the moon moves and shakes could help us better prepare for trips there

An Apollo 11 astronaut places a seismometer on the surface of the moon.

The first lunar seismometer was placed on the moon in 1969 during the Apollo 11 mission.

NASA

By Lisa Grossman

A new look at decades-old data from the Apollo missions has uncovered evidence of tens of thousands of previously unrecognized moonquakes.