Seismic Efficiency for Simple Crater Formation in the Martian Top Crust Analog
The first seismometer operating on the surface of another planet was deployed by the NASA InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) mission to Mars. It gives us an opportunity to investigate the seismicity of Mars, including any seismic activity caused b...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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AMER GEOPHYSICAL UNION
2021
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| Online Access: | http://purl.org/au-research/grants/arc/DE180100584 http://hdl.handle.net/20.500.11937/90194 |
| _version_ | 1848765350464716800 |
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| author | Rajšić, Andrea Miljkovic, Katarina Collins, G.S. Wünnemann, K. Daubar, I.J. Wójcicka, N. Wieczorek, M.A. |
| author_facet | Rajšić, Andrea Miljkovic, Katarina Collins, G.S. Wünnemann, K. Daubar, I.J. Wójcicka, N. Wieczorek, M.A. |
| author_sort | Rajšić, Andrea |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The first seismometer operating on the surface of another planet was deployed by the NASA InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) mission to Mars. It gives us an opportunity to investigate the seismicity of Mars, including any seismic activity caused by small meteorite bombardment. Detectability of impact generated seismic signals is closely related to the seismic efficiency, defined as the fraction of the impactor's kinetic energy transferred into the seismic energy in a target medium. This work investigated the seismic efficiency of the Martian near surface associated with small meteorite impacts on Mars. We used the iSALE-2D (Impact-Simplified Arbitrary Lagrangian Eulerian) shock physics code to simulate the formation of the meter-size impact craters, and we used a recently formed 1.5 m diameter crater as a case study. The Martian crust was simulated as unfractured nonporous bedrock, fractured bedrock with 25% porosity, and highly porous regolith with 44% and 65% porosity. We used appropriate strength and porosity models defined in previous works, and we identified that the seismic efficiency is very sensitive to the speed of sound and elastic threshold in the target medium. We constrained the value of the impact-related seismic efficiency to be between the order of ∼10-7 to 10-6 for the regolith and ∼10-4 to 10-3 for the bedrock. For new impacts occurring on Mars, this work can help understand the near-surface properties of the Martian crust, and it contributes to the understanding of impact detectability via seismic signals as a function of the target media. |
| first_indexed | 2025-11-14T11:33:51Z |
| format | Journal Article |
| id | curtin-20.500.11937-90194 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:33:51Z |
| publishDate | 2021 |
| publisher | AMER GEOPHYSICAL UNION |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-901942023-02-20T07:51:37Z Seismic Efficiency for Simple Crater Formation in the Martian Top Crust Analog Rajšić, Andrea Miljkovic, Katarina Collins, G.S. Wünnemann, K. Daubar, I.J. Wójcicka, N. Wieczorek, M.A. Science & Technology Physical Sciences Geochemistry & Geophysics impact cratering InSight mission iSALE‐ 2D code Mars numerical modeling seismic efficiency METEORITE IMPACTS ELYSIUM PLANITIA MARS EXPLOSION The first seismometer operating on the surface of another planet was deployed by the NASA InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) mission to Mars. It gives us an opportunity to investigate the seismicity of Mars, including any seismic activity caused by small meteorite bombardment. Detectability of impact generated seismic signals is closely related to the seismic efficiency, defined as the fraction of the impactor's kinetic energy transferred into the seismic energy in a target medium. This work investigated the seismic efficiency of the Martian near surface associated with small meteorite impacts on Mars. We used the iSALE-2D (Impact-Simplified Arbitrary Lagrangian Eulerian) shock physics code to simulate the formation of the meter-size impact craters, and we used a recently formed 1.5 m diameter crater as a case study. The Martian crust was simulated as unfractured nonporous bedrock, fractured bedrock with 25% porosity, and highly porous regolith with 44% and 65% porosity. We used appropriate strength and porosity models defined in previous works, and we identified that the seismic efficiency is very sensitive to the speed of sound and elastic threshold in the target medium. We constrained the value of the impact-related seismic efficiency to be between the order of ∼10-7 to 10-6 for the regolith and ∼10-4 to 10-3 for the bedrock. For new impacts occurring on Mars, this work can help understand the near-surface properties of the Martian crust, and it contributes to the understanding of impact detectability via seismic signals as a function of the target media. 2021 Journal Article http://hdl.handle.net/20.500.11937/90194 10.1029/2020JE006662 English http://purl.org/au-research/grants/arc/DE180100584 http://purl.org/au-research/grants/arc/DP180100661 http://creativecommons.org/licenses/by-nc/3.0/ AMER GEOPHYSICAL UNION fulltext |
| spellingShingle | Science & Technology Physical Sciences Geochemistry & Geophysics impact cratering InSight mission iSALE‐ 2D code Mars numerical modeling seismic efficiency METEORITE IMPACTS ELYSIUM PLANITIA MARS EXPLOSION Rajšić, Andrea Miljkovic, Katarina Collins, G.S. Wünnemann, K. Daubar, I.J. Wójcicka, N. Wieczorek, M.A. Seismic Efficiency for Simple Crater Formation in the Martian Top Crust Analog |
| title | Seismic Efficiency for Simple Crater Formation in the Martian Top Crust Analog |
| title_full | Seismic Efficiency for Simple Crater Formation in the Martian Top Crust Analog |
| title_fullStr | Seismic Efficiency for Simple Crater Formation in the Martian Top Crust Analog |
| title_full_unstemmed | Seismic Efficiency for Simple Crater Formation in the Martian Top Crust Analog |
| title_short | Seismic Efficiency for Simple Crater Formation in the Martian Top Crust Analog |
| title_sort | seismic efficiency for simple crater formation in the martian top crust analog |
| topic | Science & Technology Physical Sciences Geochemistry & Geophysics impact cratering InSight mission iSALE‐ 2D code Mars numerical modeling seismic efficiency METEORITE IMPACTS ELYSIUM PLANITIA MARS EXPLOSION |
| url | http://purl.org/au-research/grants/arc/DE180100584 http://purl.org/au-research/grants/arc/DE180100584 http://hdl.handle.net/20.500.11937/90194 |