DOI: 10.1029/2018JE005649
Scopus记录号: 2-s2.0-85051176995
论文题名: The Search for Active Marsquakes Using Subpixel Coregistration and Correlation: Best Practice and First Results
作者: Grindrod P.M. ; Hollingsworth J. ; Ayoub F. ; Hunt S.A.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 7 起始页码: 1881
结束页码: 1900
语种: 英语
英文关键词: correlation
; fault
; Mars
; seismic
英文摘要: The state of seismic activity on Mars is currently unknown. On Earth, coseismic displacement has been observed using visible wavelength images and subpixel coregistration and correlation techniques. We apply this method to Mars with the COSI-Corr (Co-registration of Optically Sensed Images and Correlation) software package using High-Resolution Imaging Science Experiment (HiRISE) images, focusing on part of the Cerberus Fossae fault system. We derive best practices for applying this method to the study of coseismic displacements on Mars. Using a time series of eight overlapping HiRISE images, we achieve pixel coregistration with a mean accuracy of about 1/50 of a pixel. We see no clear evidence for coseismic displacement in this region during a time period of over 8 years. One possible displacement signal (1–2 m of west-east displacement over a length scale of about 50 m) that has similarities to terrestrial coseismic deformation was dismissed as the result of incomplete correction of steep topography during the coregistration stage. Ancillary observations of recurring slope lineae (RSL) activity in the surrounding fault system offer no supporting evidence for the occurrence of coseismic displacement but do seem to suggest RSL activity that does not fit into previous seasonal timescales. Although it is unlikely that we have observed coseismic displacement in our study area during this time period, the best practice method and the accuracy of our results offer encouragement for future studies. HiRISE, Context Camera, and Color and Stereo Surface Imaging System images can be used to complement and independently verify in situ seismic observations by the InSight (Interior Exploration using Seismic Investigations, Geodesy, and Heat Transport) lander or source location changes from the ExoMars Trace Gas Orbiter spacecraft. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113645
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth Sciences, Natural History Museum, London, United Kingdom; ISTerre, Université Grenoble Alpes, Grenoble, France; ISTerre, CNRS, Grenoble, France; Seismological Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Earth Sciences, University College London, London, United Kingdom
Recommended Citation:
Grindrod P.M.,Hollingsworth J.,Ayoub F.,et al. The Search for Active Marsquakes Using Subpixel Coregistration and Correlation: Best Practice and First Results[J]. Journal of Geophysical Research: Planets,2018-01-01,123(7)