Scientists have found that the Moon continues to cool and contract. To this conclusion they came, having compared the data of seismographs operating during the expeditions of the Apollo program in the 1960-1970-ies, and the geological map prepared in 2010 by the photos of the satellite “Lunar orbital reconnaissance” writes
According to the researchers, the moon continues the tectonic and seismic activity, while the core cools down and continues to shrink, resulting in earthquakes and the emergence of new faults.
From 1969 to 1977 occurred the 28 lunar quakes of magnitudes from two to five on the Richter scale.
“We found that eight of the marked program “Apollo” moonquakes occurred very close to the faults identified by the LRO satellite. We believe that these faults are active today,” said one of the authors of the study associate Professor of Geology University Nicholas Smar.
The researchers note that of these eight, six tectonic earthquakes occurred when the Moon was farthest from our planet. The attraction of the Earth have created additional stress in the lunar crust and triggered seismic vibrations.
As told fellow centre for the study of Earth and planets at the Smithsonian institution in Washington, Thomas Watters, the Moon continues to shrink, “to wrinkle like drying the grapes turning into raisins”. Because the moon’s surface is solid and not flexible, it will appear multiple faults.
Scientists believe that the study of tectonic activity of the natural satellite of our planet will come closer to unraveling its origin. For further research of tectonic activity requires modern seismometers on the moon’s surface.
Earlier, Japanese researchers have theorized that the Moon could have formed from magma that once covered the surface of the Earth.