The Sky at Night — Episode 10: Moon-quakes!

You are watching the episode Moon-quakes! The devastating results of earthquakes are well known, but recent observations have shown that the moon too has moon-quakes, and they are linked with the tidal effects of the earth on the moon. Patrick Moore, who has himself been concerned with the observations, talks to Dr Maurice Ewing, leader of the American investigating team, and other leading authorities about these discoveries and their significance.