Seismic Potential Revealed by Surface Folding: 1983 Coalinga, California, Earthquake

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Science  25 May 1984:
Vol. 224, Issue 4651, pp. 869-872
DOI: 10.1126/science.224.4651.869


The 2 May 1983 Coalinga, California, earthquake (magnitude 6.5) failed to rupture through surface deposits and, instead, elastically folded the top few kilometers of the crust. The subsurface rate of fault slip and the earthquake repeat time are estimated from seismic, geodetic, and geologic data. Three larger earthquakes (up to magnitude 7.5) during the past 20 years are also shown to have struck on reverse faults concealed beneath active folds.

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