The April 4, 2010 El Mayor-Cucapah (EMC) earthquake provided the first opportunity to use airborne LiDAR to comprehensively scan a fresh surface rupture in a well-exposed, arid environment, and the first instance where pre-event LiDAR data are also available over the entire rupture zone. 370 km2 of high resolution (9 to 18 pts/m2) post-earthquake LiDAR were collected with support from an NSF RAPID grant co-funded by the Earthscope science program. Pre-event lower resolution (0.013 pts/m2) LiDAR data were collected by the the Instituto Nacional de Estadstica y Geografa (INEGI) as part of a 2006 regional survey and made available to us through our close collaboration with colleagues in Mexico. The full surface deformation field includes significant lateral motions that are important for constraining deformation processes but require a fully 3-dimensional approach to unravel. In this proposal, we seek support for an intensive, dual-pronged research agenda to (1) develop rigorous, highresolution 3-D measurements of coseismic surface displacement from the EMC differential LiDAR and (2) analyze this surface displacement field to examine relationships between fault slip and distributed deformation and to elucidate the mechanical properties of the multiple fault strands and surrounding fault volume that ruptured in this event.
|Effective start/end date||6/1/12 → 5/31/14|
- National Science Foundation (NSF): $89,333.00