Since Mars Insight began monitoring seismic events on Mars it recorded many tectonic events, and many asteroid impacts. However a new study looks at two of the largest events, one on December 21st 2021 created a large 150meter crater and was likely caused by an asteroid weighing 500 tons travelling at 7-8 kilometers per second. Images of the crater appear to show bright spots in the ejecta, possibly ice from a sub surface permafrost layer.
The event also allowed the planetary scientists to observe the behaviour of Mars’ interior and come up with new understanding of the geology.
Largest recent impact craters on Mars: Orbital imaging and surface seismic co-investigation
https://www.science.org/doi/10.1126/science.abq7704
Surface waves and crustal structure on Mars
https://www.science.org/doi/10.1126/science.abq7157
Also mentioned this previous paper which found new craters based on Insight data.
https://cmns.umd.edu/news-events/features/4961
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