Southern California Earthquake Data Center

Significant Earthquakes and Faults

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Fault Name Index

Burnt Mountain Fault

Type of Fault: right-lateral strike-slip
Length: 21 km
Nearest Communities: Yucca Valley
Last Surface Rupture: June 28, 1992, Mw7.3 may have actually ruptured during a large aftershock
Slip Rate: about 0.5 mm/yr (?)
Interval Between Major Ruptures: unknown
Probable Magnitudes: MW 6.0 - 6.5, by itself
(This fault ruptured partially in the magnitude 7.3 Landers quake, or a large aftershock.)
Other Notes: Like its neighbor to the east (the Eureka Peak fault), the Burnt Mountain fault was unknown until the Landers earthquake sequence brought it to the attention of geologists by breaking about 5 kilometers of the total length of this fault at the surface. Once this discovery was made, subsequent mapping determined the existence of roughly 16 kilometers more surface trace. While the offset displayed along the Burnt Mountain fault in 1992 was only about 6 cm (and nearby Eureka Peak fault was offset only 21 cm), these faults are probably quite significant over geologic time in transferring slip from the San Andreas fault zone to the Eastern California Shear Zone.

 

References


This fault is featured on the following maps:
Mojave Fault Map
Southern Fault Map

 

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