Northwest Propagation of Postseismic Deformation in the Yuha Desert from the 2010 M7.2 El Mayor – Cucapah Earthquake

Andrea Donnellan, Jay W. Parker, Robert A. Granat, Michael B. Heflin, John B. Rundle, Lisa Grant Ludwig, Marlon E. Pierce, & Jun Wang

Published August 15, 2017, SCEC Contribution #7777, 2017 SCEC Annual Meeting Poster #102

The 2010 M7.2 El Mayor – Cucapah (EMC) ruptured from Baja California to the US Mexican border, triggering slip on a network of faults, primarily in the northeast lobe of coseismic deformation. Postseismic slip continued to occur on a network of conjugate faults in the Yuha Desert to the north and north-northwest of the main fault rupture. Right-lateral slip propagated northward as a result of a M5.7 aftershock that occurred on 15 June 2010, two months after the EMC earthquake. The additional right slip extends to the Elsinore fault from a surface fracture of the mainshock. The pattern of deformation indicates that the aftershock released elastic strain north of the El Mayor – Cucapah rupture that resulted from the mainshock. Substantial postseismic slip on the aftershock rupture plane continued for up to four years following the event. The GeoGateway interface (http://geo-gateway.org) was used for analysis of the UAVSAR data products.

Key Words
UAVSAR, earthquake, Yuha, Elsinore

Citation
Donnellan, A., Parker, J. W., Granat, R. A., Heflin, M. B., Rundle, J. B., Grant Ludwig, L., Pierce, M. E., & Wang, J. (2017, 08). Northwest Propagation of Postseismic Deformation in the Yuha Desert from the 2010 M7.2 El Mayor – Cucapah Earthquake. Poster Presentation at 2017 SCEC Annual Meeting.

Related Projects & Working Groups
Tectonic Geodesy