New research has revealed that the record-magnitude earthquake that shook Mars in May of this year was at least five times larger than the previous record. It was determined that the earthquake lasted 10 hours.
It’s unclear what the source of the quake was, but it’s certainly odd. In addition to being the strongest earthquake ever recorded on Mars, it was the longest to shake the red planet for 10 hours. “The energy released by this single earthquake is equivalent to the cumulative energy of all the other earthquakes we’ve seen so far,” said seismologist John Clinton of the Swiss Federal Institute of Technology. New analysis of the quake, published in Geophysical Research Letters, put its magnitude at 4.7. This may not sound like a major earthquake by Earth standards, where the strongest earthquake ever recorded was about 9.5 magnitude. But it’s pretty impressive for a planet that was thought to be seismically stationary until NASA’s InSight probe began recording its interior in early 2019.
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