Significant Earthquakes and Faults
Fault Name Index
Los Alamos Fault Zone
Type of Faulting: reverse
Length: 30 km; total length of both faults is about 55 km
Nearby Communities: Los Alamos, Los Olivos
Most Recent Rupture: Holocene for about 5 km near Highway 101, east of Los Alamos; otherwise, Late Quaternary
Slip Rate: roughly 0.7 mm/yr
Other Notes: Essentially continuous with the Baseline fault. Both faults dip to the south.
Type of Fault: reverse
Length: 25 km; total length of both faults is about 55 km
Nearby Communities: Los Olivos, Santa Ynez, Lake Cachuma
Most Recent Rupture: Late Quaternary
Other Notes: The Baseline fault is the southeast extension of the Los Alamos fault. It intersects the much larger Santa Ynez fault zone about 20 km northwest of Santa Barbara.
This fault is featured on the following map:
Northwest Fault Map