The findings come after researchers took a fresh look at data from seismometers that Apollo astronauts deployed on the moon in the 1960s and 1970s. - NBCNewsMACH
about 4.5 billion years ago. It’s been cooling slowly ever since, shrinking as its interior temperature dips.
The scientists found that eight of the moonquakes originated near scarps, which are known to form when adjacent pieces of lunar crust along a fault line push up against each other. And six of the quakes occurred when the moon was close to apogee, the point in its orbit around Earth when it’s farthest from our planet and subjected to moon-shaking stress from its gravity.
This prominent lunar lobate thrust fault scarp is one of thousands discovered in Lunar Reconnaissance Orbiter Camera images.“What we didn't know was how recently the young faults had been active,” Thomas Watters, a senior scientist at the Smithsonian Institution’s National Air and Space Museum in Washington, said in an email. “That was a surprise!”
The findings could someday help guide the placement of future moon settlements far away from moonquake-prone areas, he added.
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