Earthquake Information

Fault Name Index

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Elmore Ranch Fault (Includes West Elmore Ranch Fault)

TYPE OF FAULTING: left-lateral strike-slip
LENGTH: about 10 km
NEAREST COMMUNITY: Westmorland
LAST MAJOR RUPTURE: November 23, 1987; Mw6.2
SLIP RATE: between 0.5 and 1.5 mm/yr
INTERVAL BETWEEN MAJOR RUPTURES: 150 to 300 years (?)
MAXIMUM SURFACE OFFSET: ML 5.8 to 6.5

Elmore Ranch East Fault

TYPE OF FAULTING: right-lateral strike-slip
LENGTH: about 10 km
NEAREST COMMUNITY: Westmorland
LAST MAJOR RUPTURE: November 23, 1987; Mw6.2
SLIP RATE: between 0.5 and 1.5 mm/yr
INTERVAL BETWEEN MAJOR RUPTURES: 150 to 300 years (?)
PROBABLE MAGNITUDES: ML 5.8 to 6.5

Lone Tree Fault

TYPE OF FAULTING: right-lateral strike-slip
LENGTH: about 8 km
NEAREST COMMUNITY: Westmorland
LAST MAJOR RUPTURE: November 23, 1987; Mw6.2
SLIP RATE: between 0.5 and 1.5 mm/yr
INTERVAL BETWEEN MAJOR RUPTURES: 150 to 300 years (?)
PROBABLE MAGNITUDES: ML 5.7 to 6.3

References

These faults are featured on the following map:
Southern Fault Map