Imperial Fault Zone

The Imperial Fault Zone is 69km long right lateral slip fault zone located near the communities of Brawley and Imperial in southern California.

A very active fault it has seen several instances of surface rupture and triggered slip.

USGS Information on the Imperial Fault Zone – A

Information from the Southern California Earthquake Database

The most recent surface ruptures of the Fault were a M6.4 on October 15, 1979 and a M 6.9 on May 18, 1940,