Results from the geodetic response to the 2019 Ridgecrest earthquakes

Gareth J. Funning

Published August 13, 2020, SCEC Contribution #10506, 2020 SCEC Annual Meeting Talk on TBD

The July 2019 Ridgecrest earthquakes set new standards for the amount and quality of geodetic observations of large continental earthquakes. A rapid field response by several groups led to a dense deployment of campaign GNSS instruments around the epicentral region, including a handful of stations that were deployed before the M7.1 mainshock. Support in this work from scientists away from the field, including processing of GNSS data and InSAR data, was critical. High resolution Sentinel-1 InSAR data were available within days of the events, providing dense measurements of the total deformation from the two earthquakes, and assisting field responders in their mapping of the fault surface ruptures. In the 13 months since the events, we have continued to measure campaign GNSS and InSAR displacements in order to capture any transient postseismic deformation. I will present a summary of the results obtained so far from geodetic data for the 2019 events, including the likelihood of conjugate rupture in the M6.4 foreshock, the distribution of slip on the complex branching rupture of the M7.1 mainshock, and the slow, deep afterslip that followed them.

Citation
Funning, G. J. (2020, 08). Results from the geodetic response to the 2019 Ridgecrest earthquakes. Oral Presentation at 2020 SCEC Annual Meeting.

Related Projects & Working Groups
Tectonic Geodesy