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Extensive secondary cratering from the InSight Sol 1034a impact event
File(s)
Author(s)
Grindrod, PM
Daubar, IJ
Fernando, B
Kim, D
Collins, GS
Type
Journal Article
Abstract
Impact cratering is one of the fundamental processes throughout the history of the Solar System. The formation of new impact craters on planetary bodies has been observed with repeat images from orbiting satellites. However, the time gap between images is often large enough to preclude detailed analysis of smaller-scale features such as secondary impact craters, which are often removed or buried over a short time period. Here we use a seismic event detected on Mars by the NASA InSight mission to investigate secondary cratering at a new impact crater. We strengthen the case that the seismic event that occurred on Sol 1034 (S1034a) is the result of a new impact cratering event. Using the exact timing of this event from InSight, we investigated the resulting new impact crater in orbital image data. The S1034a impact crater is approximately 9 m in diameter but is responsible for over 900 secondary impact events in the form of low albedo spots that are located at distances of up to almost 7 km from the primary crater. We suggest that the low albedo spots formed from relatively low energy ejecta, with individual ejecta block velocities less than 200 m s−1. We estimate that the low albedo spots, the main evidence of secondary impact processes at this new impact event, fade within 200–300 days after formation.
Date Issued
2024-12-01
Date Acceptance
2024-11-22
Citation
Journal of Geophysical Research: Planets, 2024, 129 (12)
URI
URL
DOI
ISSN
2169-9097
Publisher
American Geophysical Union
Journal / Book Title
Journal of Geophysical Research: Planets
Volume
129
Issue
12
Copyright Statement
© 2024. The Author(s). This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/39703692
PII: JGRE22655
Subjects
crater
EJECTA
Geochemistry & Geophysics
impact
InSight
Mars
Physical Sciences
Science & Technology
secondary
seismic
SYSTEM
Publication Status
Published
Coverage Spatial
United States
Article Number
e2024JE008535
Date Publish Online
2024-12-18