Strain accumulation north of Los Angeles, California, as a function of time, 1977–1992

James C. Savage; Michael Lisowski

doi:10.1029/94gl01123

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Strain accumulation north of Los Angeles, California, as a function of time, 1977–1992

James C. Savage·Michael Lisowski

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Abstract

No significant change in the rate of strain accumulation in a 40×120 km trilateration network spanning the San Gabriel mountains was observed from 1977.5 to 1991.8 despite an apparent increase in seismicity ( M L > 4.5) beginning in late 1987 in the northern Los Angeles basin immediately to the south. The observed deformation (0.13±0.01 µstrain/yr right‐lateral shear across a vertical plane striking N63°W±1°) can be attributed to strain accumulation on the San Andreas fault (local strike N65°W). No significant accumulation of compression normal to the strike of the San Andreas fault was observed in the network as a whole.

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Geophysical Research Letters Article

Source-reported bounding extent: 34.08906131584994° to 35.03899204678081° latitude; -119.11376953125° to -117.8173828125° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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BibTeX RIS

James C. Savage, Michael Lisowski. 2012-12-07. Strain accumulation north of Los Angeles, California, as a function of time, 1977–1992. https://doi.org/10.1029/94gl01123

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