1.182. How sensitive seismometers installed by astronauts on the lunar surface? The sensitivity seismometer installed on the lunar surface by astronauts Neil Armstrong and Edwin Aldrin, you can fix the drop on the lunar surface a stone the size of a pea to a distance of a kilometer from the place of location of the device. This high sensitivity seismometer led to curiosity. Once the device has been turned on, present in the Mission Control Center (on the outskirts of the Texas city of Houston) was surprised to see his message about frequent moonquake as a series of aftershocks. Soon, however, it became clear that this is not the result of concern of the lunar interior, - the surface of our satellite shook steps two astronauts who install and enable the device removed spacecraft. Subsequently, four seismometer were left on the lunar surface. All of them (with the first) reported numerous jolt inside the moon, shattering the notion that the geological activity on our natural satellite has long ceased. During the year, the Moon comes between 600 and 3000 seismic events. four species were identified moonquakes - tidal, tectonic, and thermal meteorite. Every two weeks when the moon is aligned with the Earth and the sun, tidal forces cause moonquakes rise at a depth of 800-1000 kilometers.