Seismometers deployed by Apollo astronauts on the moon measured 28 moonquakes, which have now been linked to cracks on the surface
Source:
https://www.newscientist.com/article/2202490-apollo-era-moonquakes-suggest-lunar-colonies-must-be-shake-proof/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home