Triggered surface slips in southern California associated with the 2010 El Mayor-Cucapah, Baja California, Mexico, earthquake

Abstract

Landsat satellite image (LE70390372003084EDC00) showing location of surface slip triggered along faults in the greater Salton Trough area. Red bars show the generalized location of 2010 surface slip along faults in the central Salton Trough and many additional faults in the southwestern section of the Salton Trough. Surface slip in the central Salton Trough shown only where verified in the field; slip in the southwestern section of the Salton Trough shown where verified in the field or inferred from UAVSAR images.

Report on the August 2012 Brawley Earthquake Swarm in Imperial Valley, Southern California

“…Nevertheless, alignments of earthquakes from previous swarms (Shearer et al, 2005;Lin et al, 2007;Lohman and McGuire, 2007), fumarolic vents (Lynch and Hudnut, 2008), and faults displacing sedimentary layers in and around the southern Salton Sea (Brothers et al, 2009;Rymer et al, 2011) suggest that the modern deformation is controlled by a complex set of intersecting northeast-, north-, and northwesttrending faults whose surface expression has been masked by agricultural activity and repeated basin flooding events.…”

“…Nonetheless, surface fractures that are related to the swarm were identified both from InSAR images and field observations. Prior occurrences of surface faulting in association with swarm activity within the BSZ activity include the 2005 swarm (Lohman and McGuire, 2007;Rymer et al, 2011). The largest event of the 2005 swarm was M w 5.1, yet surface rupture was up to 20 cm in that case.…”

Aftershocks of the 2010 Mw 7.2 El Mayor‐Cucapah earthquake reveal complex faulting in the Yuha Desert, California

“…Rupture is not thought to have propagated into the Yuha Desert but rather triggered surface slip on faults therein [Rymer et al, 2011]. Rymer et al [2011] define triggered surface slip as shallow slip occurring on faults remote to the epicenter location.…”

“…Rupture is not thought to have propagated into the Yuha Desert but rather triggered surface slip on faults therein [Rymer et al, 2011]. Rymer et al [2011] define triggered surface slip as shallow slip occurring on faults remote to the epicenter location. For the purposes of this work, we adopt the interpretation and terminology of Rymer et al [2011] and refer to slip on faults in the Yuha Desert as "triggered surface slip" rather than "coseismic slip."…”

Shallow geological structures triggered during the Mw 6.4 Meinong earthquake, southwestern Taiwan

“…This phenomenon has been referred to as triggered slip or coactive faulting. It was observed mostly in California Borrego Mountain: Allen et al (1972; 1992 Landers earthquake sequence: Bodin et al (1994) and Price and Sandwell (1998);1994Northridge: Cruikshank et al (1996 and Johnson et al (1996); 2010 El Mayor-Cucapah: Rymer et al (2010) and Wei et al (2011)], Terr. Atmos.…”