San Gregorio Fault

The San Gregorio Fault is a 209km long right lateral strike slip fault in the San Francisco Bay Area that runs parallel to and west of the San Andreas Fault. Most of the San Gregorio fault is located offshore beneath Monterey Bay, Half Moon Bay, and the Pacific, but it comes onshore near Point Año Nuevo.

 

USGS Information on the San Gregorio Fault 

The most recent major fault along the San Gregorio Fault are estimated to be a M 7 to 7.25 in the period 600-1400.