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Abstract
Two >130-meter-diameter impact craters formed on Mars during the later half of 2021. These are the two largest fresh impact craters discovered by the Mars Reconnaissance Orbiter since operations started 16 years ago. The impacts created two of the largest seismic events (magnitudes greater than 4) recorded by InSight during its 3-year mission. The combination of orbital imagery and seismic ground motion enables the investigation of subsurface and atmospheric energy partitioning of the impact process on a planet with a thin atmosphere and the first direct test of martian deep-interior seismic models with known event distances. The impact at 35°N excavated blocks of water ice, which is the lowest latitude at which ice has been directly observed on Mars.
| Original language | English |
|---|---|
| Pages (from-to) | 412-417 |
| Number of pages | 6 |
| Journal | Science |
| Volume | 378 |
| Issue number | 6618 |
| DOIs | |
| Publication status | Published - 27 Oct 2022 |
Bibliographical note
Funding Information:Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This is InSight contribution 221 and LA-UR-22-27122. We acknowledge NASA, CNES, partner agencies and institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, ICL, and MPS-MPG), and the operators of JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. This research was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. This work was funded by NASA-NNN12AA01C with subcontract JPL-1515835 (L.V.P., M.C.M., B.A.C., C.K., G.S., D.S., A.V., and A.W.); NASA-80NM0018D0004 (W.B.B., M.G., and M.Pa.) InSight PSP grant 80NSSC20K0971 (I.J.D.) and 80NSSC18K1626 (R.L); the MRO HiRISE project (C.M.D.); ETH Zurich through the ETH+ funding scheme (ETH+02 19-1: “Planet Mars”) (J.C., D.G., S.C., S.C.S., C.D., N.D., A.K., D.K., and G.Z.); ETH research grant ETH-10 17-3 (S.C.S.); UK Space Agency grants ST/R002096/1, ST/V00638X/1, ST/T002026/1, ST/ S001514/1, and ST/W002523/1 (A.H., C.C., N.A.T., G.S.C., N.W., and W.T.P.); the Australian Research Council (DP180100661 and FT210100063) (K.M. and A.R.); the French Space Agency CNES and ANR fund (ANR-19-CE31-0008-08) (P.L., T.K., M.F., Z.X., É.B., R.F.G., L.M., S.M., C.Pa., C.Pe., M.Pl., L.R., A.Sp., A.St., and M.D.); and the Center for Space and Earth Science of LANL (Student Fellow Project) (M.F., C.L., and E.R.). This study contributes to IdEx Université Paris Cite ANR-18-IDEX-0001 (P.L., T.K., M.F., Z.X., S.M., C.Pa., M.Pl., and M.D.).
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