Strain accumulation on the San Andreas Fault near Palmdale, California

Journal of Geophysical Research B: Solid Earth
By:  and 

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Abstract

Precise distance measurements of a 10×25 km 15‐station trilateration network that spans the San Andreas fault west of Palmdale, California, have been repeated annually in the period 1971–1975. The network appears to be deforming under simple uniform tensor shear of about 0.21±0.03 μstrain/yr with the direction of maximum right‐lateral shear parallel to the local strike of the San Andreas fault. Comparison of trilateration with triangulation surveys of the same network shows that the rate of strain accumulation has been constant over the past 40 yr. The strain accumulation can be explained by conventional dislocation models (i.e., slip at depth beneath a locked section) of the San Andreas fault with 30‐ to 50‐mm/yr slip. Leveling surveys along a 16‐km line that crosses the fault at Palmdale indicate significant changes in tilt but with frequent reversals, so that no net tilt has accumulated in the overall period 1935–1975.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Strain accumulation on the San Andreas Fault near Palmdale, California
Series title Journal of Geophysical Research B: Solid Earth
DOI 10.1029/JB081i026p04901
Volume 81
Issue 26
Year Published 1976
Language English
Publisher American Geophysical Union
Contributing office(s) Earthquake Science Center
Description 8 p.
First page 4901
Last page 4908
Country United States
State California
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