Earthquakes have been recorded on Mars

There were 4.2 and 4.1 earthquakes on Mars – they are five times more powerful than the largest previously recorded earthquakes on the planet.

Thanks to this research, we will be able to learn more about the internal structure of Mars, in particular about its boundary between the planet’s core and the mantle. In the distant future, this knowledge could be used to build Martian bases or even mines.

The earthquake of magnitude 4.2 (designated S0976a) came from the JM Marineris area characterized by massive valleys. Its depth is 7 kilometers! Previous satellite images documented the occurrence of the dams, a series of faults and landslides, and this indicates the seismic activity of the area. There is a documented earthquake the first confirmed activity of this type.

Scientists have not been able to determine the exact location of the second earthquake (marked as S1000a). However, he has grown up on the other side of the planet from the beginning. It has been determined that seismic waves have crossed the fundamental boundary of Mars. The unique feature of this event was the fact that it was the longest seismic energy ever recorded in Marceau which lasted 94 minutes.

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Earthquake site / Hurrelston et al. (2022) / open access / public domain

Both earthquakes were found in the so-called “shadow zone” – this is the other side of the planet where InSight is located. For the first time, the probe and sensors recorded an earthquake of Mars. From such a great distance.

The sensors were able to record these events thanks to the PP and SS. A wave that does not follow directly from the epicenter but is reflected off the surface at least once.

“Recording the event in the core shadow zone is a real step in our understanding of Mars,” says geophysicist Savas Ceylan of ETH Zürich in Switzerland.

“[S1000a] “Its frequency spectrum is very similar to the set of events we’ve identified as shallow earthquakes, so this event could have occurred close to the surface,” says planetary seismologist Anna Hurleston from the University of Bristol in the UK.

He also adds, “S0976a looks a lot like a lot of events that we have translated into Cerberus Fossei (wide fault zone) with a typical depth of about 50 km and it is likely that this event has the same deep source mechanism.”

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