Earthquake Information
Fault Name Index
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Crafton Hills Fault Zone
TYPE OF FAULT: normal (?)
LENGTH: about 20 km, for the zone; zone consists of at least 10 faults, each 10 km or less
NEARBY COMMUNITIES: Redlands, Mentone, Yucaipa
MOST RECENT RUPTURE: Holocene
Above, you can see the location of the Crafton Hills fault zone -- caught in a wedge between the San Andreas fault zone (in red), and the San Jacinto fault zone (in purple). Indeed, the Crafton Hills fault zone exists because of the actions of these two major faults. The sense of slip for both the San Jacinto and San Andreas faults is right-lateral. Thus, the area between the two, near the intersection, is being pulled apart. When this sort of extensional action exists, normal faults typically develop.
This fault is featured on the following maps:
Mojave Fault Map
Southern Fault Map
Los Angeles Fault Map
San Gorgonio Pass Fault Map
