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

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

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.1173s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 12, p. 1173-1176

Mathematics

Logic

4

California, Earth Crust, Earth Movements, Elastic Deformation, Optical Measurement, San Andreas Fault, Strain Measurement, Strain Rate, Geodesy, Geodimeters, Geological Surveys, Mountains, Tensors

Scientific paper

No significant change in the rate of strain accumulation in a 40 x 120 km trilateration network spanning the San Gabriel mountains was observed from 1977.5 to 1991.8 despite an apparent increase in seismicity (M(sub L) greater than 4.5) beginning in late 1987 in the northern Los Angeles basin immediately to the south. The observed deformation (0.13 +/- 0.01 microstrain/yr right-lateral shear across a vertical plane striking N 63 deg W +/- 1 deg) can be attributed to strain accumulation on the San Andreas fault (local strike N 65 deg 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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