Testing Predictions from the Cascade and Pre-Seismic Slip Models for Foreshock Occurrence with the High Precision Catalog for Northern California

Lead PI: Dr. David Schaff , Dr. Felix Waldhauser

Unit Affiliation: Seismology, Geology and Tectonophysics, Lamont-Doherty Earth Observatory (LDEO)

April 2010 - March 2014
North America ; California
Project Type: Research

DESCRIPTION: The project will examine foreshocks to test two hypotheses: the cascade model and the pre-seismic slip model using a catalog of foreshock sequences in northern California. This is to help determine how large earthquakes initiate.

OUTCOMES: Found a negative correlation between foreshock occurrence and depth, a positive correction between occurrence and rake, and a positive correlation between occurrence and mainshock magnitude which may be consistent with the pre-slip model.