Seismometers on the NASA InSight lander have identified unusual signals from meteoroid impacts on Mars. Impact locations were confirmed by satellite images of new craters at these sites and directly constrain the martian interior, confirming its crustal structure and ground-truthing the scaling of impact-induced seismicity.
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References
Daubar, I. J. et al. Impact-Seismic Investigations of the InSight Mission. Space Sci. Rev. 214, 132 (2018). A Review article that presented plans for InSight’s observations of impacts, according to the state of the field of impact-seismic science at the time.
Garcia, R. F. et al. Finite-Difference Modeling of Acoustic and Gravity Wave Propagation in Mars Atmosphere: Application to Infrasounds Emitted by Meteor Impacts. Space Sci. Rev. 211, 547–570 (2017). This paper modelled acoustic waves in the atmosphere that were expected to result from impacts on Mars.
Daubar, I. J. et al. New Craters on Mars: An Updated Catalog. J. Geophys. Res. Planets 127, e2021JE007145 (2022). This paper presents 1,203 impacts on Mars, which occurred in the last few decades.
Daubar, I. J. et al. A New Crater Near InSight: Implications for Seismic Impact Detectability on Mars. J. Geophys. Res. Planets 125, e2020JE006382 (2020). This paper reports on an impact that occurred only 37 km away from InSight, which was not detected seismically.
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This is a summary of: Garcia, R. F. et al. Newly formed craters on Mars located using seismic and acoustic wave data from InSight. Nat. Geosci. https://doi.org/10.1038/s41561-022-01014-0 (2022).
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First seismic detections of natural impacts linked to craters on another planet. Nat. Geosci. 15, 761–762 (2022). https://doi.org/10.1038/s41561-022-01029-7
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DOI: https://doi.org/10.1038/s41561-022-01029-7
