Southern California Earthquake Data Center

Significant Earthquakes and Faults

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Fault Name Index

Red Hill Fault (also Etiwanda Avenue Fault)

Type of Faulting: thrust
Length: about 25 km (see below)
Nearest Communities: Etiwanda, Alta Loma, Upland
Slip Rate: uncertain
Interval Between Major Ruptures: unknown
Probable Magnitudes: MW6.0 - 7.0
Most Recent Surface Rupture: Holocene at eastern end; otherwise, Late Quaternary
Other Notes: This fault dips to the north. The eastern 9 kilometers of the Red Hill-Etiwanda Avenue fault is often considered to be a part of the Cucamonga fault zone, as it shows surface rupture more similar to that of the Cucamonga fault zone than to that of the rest of the Red Hill fault.



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