Earthquake Information
Fault Name Index
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Superstition Hills Fault
TYPE OF FAULT: right-lateral strike-slip
LENGTH: 30 km
NEAREST COMMUNITIES: Imperial, El Centro
MOST RECENT SURFACE RUPTURE: November 24, 1987, Mw6.6; other minor historic ruptures and slip events
SLIP RATE: between 1.7 and 5.5 mm/yr
INTERVAL BETWEEN MAJOR RUPTURES: between 150 and 300 years
PROBABLE MAGNITUDES: MW6.0 - 6.8
OTHER NOTES: The last significant surface rupture prior to 1987 was sometime after 1660 A.D., but before 1915.
This fault is featured on the following map:
Southern Fault Map
