Evidence for large earthquakes in metropolitan Los Angeles
Department or Administrative Unit
The Sierra Madre fault, along the southern flank of the San Gabriel Mountains in the Los Angeles region, has failed in magnitude 7.2 to 7.6 events at least twice in the past 15,000 years. Restoration of slip on the fault indicated a minimum of about 4.0 meters of slip from the most recent earthquake and suggests a total cumulative slip of about 10.5 meters for the past two prehistoric earthquakes. Large surface displacements and strong ground motions resulting from greater than magnitude 7 earthquakes within the Los Angeles region are not yet considered in most seismic hazard and risk assessments.
Rubin, C. M., Lindvall, S. C., & Rockwell, S. C. (1998). Evidence for Large Earthquakes in Metropolitan Los Angeles. Science, 281(5375), 398–402. https://doi.org/10.1126/science.281.5375.398
Copyright © 1998 The Authors