Lunar astronauts used seismographs on their visits to the Moon,
and found that small Moonquakes occurred several kilometers beneath the surface, causing ruptures and cracks.
Lunar astronauts used seismographs on their visits to the Moon,
and found that small Moonquakes occurred several kilometres beneath the surface, causing ruptures and cracks.
Lunar space travelers utilized seismographs on their visits to the Moon,
and found that little Moonquakes happened a few kilometers underneath the surface, causing bursts and breaks.