Seismic Efficiency and Seismic Moment for Small Craters on Mars Formed in the Layered Uppermost Crust
Seismic activity generated by impacts depends on impact conditions and properties of the impact site. Here, we combined mapping of the regolith thickness with numerical impact simulations to better estimate the seismic efficiency and seismic moment generated in small impact events in the uppermost c...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Published: |
2023
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| Online Access: | http://purl.org/au-research/grants/arc/DP180100661 http://hdl.handle.net/20.500.11937/94734 |
| _version_ | 1848765908703510528 |
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| author | Rajšić, A. Miljkovic, Katarina Wójcicka, N. Collins, G.S. Garcia, R.F. Bredemeyer, C. Lagain, Anthony Daubar, I.J. Lognonné, P. |
| author_facet | Rajšić, A. Miljkovic, Katarina Wójcicka, N. Collins, G.S. Garcia, R.F. Bredemeyer, C. Lagain, Anthony Daubar, I.J. Lognonné, P. |
| author_sort | Rajšić, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Seismic activity generated by impacts depends on impact conditions and properties of the impact site. Here, we combined mapping of the regolith thickness with numerical impact simulations to better estimate the seismic efficiency and seismic moment generated in small impact events in the uppermost crust on Mars. We used mapping of crater morphology to determine the regolith thickness that craters formed in. We found that local regolith thickness in the late Amazonian units is between 4 and 9 m. Combined with previous estimates for the NASA InSight landing site, we composed a more realistic uppermost crust analog and implemented it in numerical impact simulations. We estimated the seismic efficiency and seismic moment for small craters on Mars impacting a non-porous or fractured bedrock overlaid by 5, 10, or 15 m thick regolith. Seismic energy showed more dependence on target properties. Three orders of magnitude more energy were produced in stronger targets. The seismic moment does not depend on target properties, and we confirm that seismic moment is almost proportional to impact momentum. The resulting seismic moment is in agreement up to a factor of 4 between different target types. We improved the scaling relationships developed from numerical simulations used in seismic moment approximations by constraining its dependence on more realistic target properties. |
| first_indexed | 2025-11-14T11:42:44Z |
| format | Journal Article |
| id | curtin-20.500.11937-94734 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:42:44Z |
| publishDate | 2023 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-947342024-04-17T07:43:47Z Seismic Efficiency and Seismic Moment for Small Craters on Mars Formed in the Layered Uppermost Crust Rajšić, A. Miljkovic, Katarina Wójcicka, N. Collins, G.S. Garcia, R.F. Bredemeyer, C. Lagain, Anthony Daubar, I.J. Lognonné, P. Seismic activity generated by impacts depends on impact conditions and properties of the impact site. Here, we combined mapping of the regolith thickness with numerical impact simulations to better estimate the seismic efficiency and seismic moment generated in small impact events in the uppermost crust on Mars. We used mapping of crater morphology to determine the regolith thickness that craters formed in. We found that local regolith thickness in the late Amazonian units is between 4 and 9 m. Combined with previous estimates for the NASA InSight landing site, we composed a more realistic uppermost crust analog and implemented it in numerical impact simulations. We estimated the seismic efficiency and seismic moment for small craters on Mars impacting a non-porous or fractured bedrock overlaid by 5, 10, or 15 m thick regolith. Seismic energy showed more dependence on target properties. Three orders of magnitude more energy were produced in stronger targets. The seismic moment does not depend on target properties, and we confirm that seismic moment is almost proportional to impact momentum. The resulting seismic moment is in agreement up to a factor of 4 between different target types. We improved the scaling relationships developed from numerical simulations used in seismic moment approximations by constraining its dependence on more realistic target properties. 2023 Journal Article http://hdl.handle.net/20.500.11937/94734 10.1029/2022JE007698 http://purl.org/au-research/grants/arc/DP180100661 http://purl.org/au-research/grants/arc/FT210100063 http://purl.org/au-research/grants/arc/DE180100584 http://purl.org/au-research/grants/arc/DP210100336 http://creativecommons.org/licenses/by/4.0/ fulltext |
| spellingShingle | Rajšić, A. Miljkovic, Katarina Wójcicka, N. Collins, G.S. Garcia, R.F. Bredemeyer, C. Lagain, Anthony Daubar, I.J. Lognonné, P. Seismic Efficiency and Seismic Moment for Small Craters on Mars Formed in the Layered Uppermost Crust |
| title | Seismic Efficiency and Seismic Moment for Small Craters on Mars Formed in the Layered Uppermost Crust |
| title_full | Seismic Efficiency and Seismic Moment for Small Craters on Mars Formed in the Layered Uppermost Crust |
| title_fullStr | Seismic Efficiency and Seismic Moment for Small Craters on Mars Formed in the Layered Uppermost Crust |
| title_full_unstemmed | Seismic Efficiency and Seismic Moment for Small Craters on Mars Formed in the Layered Uppermost Crust |
| title_short | Seismic Efficiency and Seismic Moment for Small Craters on Mars Formed in the Layered Uppermost Crust |
| title_sort | seismic efficiency and seismic moment for small craters on mars formed in the layered uppermost crust |
| url | http://purl.org/au-research/grants/arc/DP180100661 http://purl.org/au-research/grants/arc/DP180100661 http://purl.org/au-research/grants/arc/DP180100661 http://purl.org/au-research/grants/arc/DP180100661 http://hdl.handle.net/20.500.11937/94734 |