So this article mentions moonquakes and the sensors: http://news.discovery.com/space/history-of-space/moon-magma-122102.htm http://news.discovery.com/space/hist

So this article mentions moonquakes and the sensors: http://news.discovery.com/space/history-of-space/moon-magma-122102.htm http://news.discovery.com/space/history-of-space/moon-magma-... "Moonquakes detected by seismic sensors installed during the Apollo missions support the notion of recent activity on the moon, researchers added."