Moon is shrinking, quaking: Study
Earth’s satellite Moon is gradually shrinking overtime leading to wrinkles in its crust and tremors. This was revealed by photos captured by NASA’s Lunar Reconnaissance Orbiter. This was learnt due to the study of Apollo seismic data and analysis of more than 12,000 photos released by the orbiter.
It may be noted that the Moon does not have tectonic plates like Earth, still it suffers from quakes. New research data from seismometers, placed on the Moon around 1969 and 1977, reveal that the images from NASA’s lunar orbiter that has taken over 3,500 images since 2009. It reveals that there now exists stair-step cliffs called thrust faults overlapping each other, says a report.
Presently, experts feel that thousands of such cliffs on the Moon and it has gone some 50 meters skinnier due to his process and during this development suffers quakes. The data revealed that about 28 Moonquakes were recorded between 1969 and 1977 and found that at least eight quakes were not due to the impacts of asteroid or rumblings from the Moon’s interior but as a result of activity along the faults.
The experts are of the opinion that the quakes continue to occur on the Moon which is its own internal process, said Nathan Williams, a post doctoral researcher at NASA's Jet Propulsion Laboratory.