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Survey and Continuous GNSS in the Vicinity of the July 2019 Ridgecrest Earthquakes

Michael Floyd, Gareth Funning, Yuri Fialko, Rachel Terry, & Thomas Herring

Published February 12, 2020, SCEC Contribution #9995

The Mw6.4 and Mw7.1 Ridgecrest earthquakes of July 2019 occurred within 34 hours of each other on conjugate strike-slip faults in the Mojave Desert, California, just north of the central Garlock Fault. Here we present the results of a survey of 11 Global Navigation Satellite Systems (GNSS) sites conducted in the immediate aftermath of the earthquakes, including five sites which recorded the motion of the second earthquake, after having been set up immediately following the first, as well as processed results from continuous GNSS sites throughout the region. Our field work in response to the earthquakes provide additional constraints on the ground displacement due to both earthquakes, complementing data from a spatially sparser network of continuously recording GNSS sites in the area, as well as temporally sparser Interferometric Synthetic Aperture Radar (InSAR) data that were able to capture a combined deformation signal from the two earthquakes.

Floyd, M., Funning, G., Fialko, Y., Terry, R., & Herring, T. (2020). Survey and Continuous GNSS in the Vicinity of the July 2019 Ridgecrest Earthquakes. Seismological Research Letters, 91(4), 2047-2054. doi: 10.1785/0220190324.