Two Seismic Events from InSight Confirmed as New Impacts on Mars

Author:

Daubar Ingrid J.ORCID,Fernando Benjamin A.ORCID,Garcia Raphaël F.ORCID,Grindrod Peter M.ORCID,Zenhäusern GéraldineORCID,Wójcicka NataliaORCID,Teanby Nicholas A.ORCID,Stähler Simon C.ORCID,Posiolova Liliya,Horleston Anna C.ORCID,Collins Gareth S.ORCID,Charalambous ConstantinosORCID,Clinton JohnORCID,Banks Maria E.ORCID,Froment MarouchkaORCID,Lognonné PhilippeORCID,Panning MarkORCID,Banerdt W. BruceORCID

Abstract

Abstract We report confirmed impact sources for two seismic events on Mars detected by the NASA InSight mission. These events have been positively associated with fresh impact craters identified from orbital images, which match predicted locations and sizes to within a factor of 3, and have formation time constraints consistent with the seismic event dates. They are both of the very high frequency family of seismic events and are present with chirps (dispersed infrasound/acoustic waves). This brings the total number of confirmed Martian impact-related seismic events to eight thus far. All seismic events with chirp signals have now been confirmed as having been caused by impact cratering events. This includes all seismic activity within 100 km of the lander and two out of the four events with source locations between 100 and 300 km distance.

Funder

NASA ∣ SMD ∣ Planetary Science Division

Government of the United Kingdom

Publisher

American Astronomical Society

Subject

Space and Planetary Science,Earth and Planetary Sciences (miscellaneous),Geophysics,Astronomy and Astrophysics

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