Authors
Eric J Fielding, Simran S Sangha, David PS Bekaert, Sergey V Samsonov, Jefferson C Chang
Publication date
2017/7/1
Journal
Seismological Research Letters
Volume
88
Issue
4
Pages
971-982
Publisher
Seismological Society of America
Description
The 3 September 2016  5.8 Pawnee earthquake shook a large area of north‐central Oklahoma and was the largest instrumentally recorded earthquake in the state. We processed Synthetic Aperture Radar (SAR) from the Copernicus Sentinel‐1A and Sentinel‐1B and Canadian RADARSAT‐2 satellites with interferometric SAR analysis for the area of north‐central Oklahoma that surrounds Pawnee. The interferograms do not show phase discontinuities that would indicate surface ruptures during the earthquake. Individual interferograms have substantial atmospheric noise caused by variations in radar propagation delays due to tropospheric water vapor, so we performed a time‐series analysis of the Sentinel‐1 stack to obtain a more accurate estimate of the ground deformation in the coseismic time interval and the time variation of deformation before and after the earthquake. The time‐series fit for a step …
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