(from the article `earthquake`) By 1969, seismographs had been placed at six sites on the Moon during the U.S. Apollo missions. Recording of seismic data ceased in September 1977. ... ...less than half that of Earth. Seismic activity is probably far less than that of Earth, though this conclusion needs to be verified by ... [2 relate...
Found on
http://www.britannica.com/eb/a-z/m/118
A seismic disturbance on the Moon. Most moonquakes are small and deep-seated, and take place when the tidal effects of Earth and the Sun are strongest – at times of perigee, apogee, new moon, and full moon.
Found on
http://www.daviddarling.info/encyclopedia/M/moonquake.html
a seismic vibration of the moon's surface.
Found on
https://www.infoplease.com/dictionary/moonquake
No exact match found.
