Moon is shrinking, study reveals

Moon is shrinking, study reveals, by Chris Ciaccia.

According to a new research study, the Moon may be shrinking as it experiences lunar quakes, known as “moonquakes.” Researchers analyzed 28 moonquakes from 1969 to 1977 and came up with the startling observation that eight of the quakes came from “true tectonic activity — the movement of crustal plates,” as opposed to impacts from asteroids or rumblings inside the celestial satellite. …

The moonquakes were recorded by five seismometers that were placed on the Moon’s surface during the Apollo 11, 12, 14, 15 and 16 missions. If they had been on Earth, the quakes would have registered between a 2 and a 5 on the Moment Magnitude scale, according to the researchers. …

NASA first saw instances of the Moon shrinking in 2010 when it analyzed imagery from its Lunar Reconnaissance Orbiter and found that it “shriveled like a raisin as its interior cooled, leaving behind thousands of cliffs called thrust faults on the moon’s surface.” …

Approximately 4.5 billion years old, the Moon is considered “tectonically active,” the researchers wrote in the study, published in the scientific journal, Nature Geoscience.

Price of postage stamps sure ain’t shrinking.