Co-seismic displacements of the 1992 landers earthquake sequence

Author:

Hudnut K. W.1,Bock Y.2,Cline M.3,Fang P.2,Feng Y.3,Freymueller J.4,Ge X.3,Gross W. K.5,Jackson D.3,Kim M.3,King N. E.5,Langbein J.5,Larsen S. C.6,Lisowski M.5,Shen Z.-K.3,Svarc J.5,Zhang J.2

Affiliation:

1. U.S. Geological Survey Pasadena, California 91106

2. I.G.P.P. Scripps Institution of Oceanography UCSD, La Jolla, California 92093

3. Department of Earth and Space Sciences UCLA Los Angeles, California 90024

4. Department of Geological Sciences Stanford University Stanford, California 94305

5. U.S. Geological Survey Menlo Park, California 94025

6. Lawrence Livermore National Lab Livermore, California 94550

Abstract

Abstract We present co-seismic displacement vectors derived from Global Positioning System (GPS) measurements of 92 stations in southern California. These GPS results are combined with five well-determined GPS displacement vectors from continuously tracking stations of the Permanent GPS Geodetic Array, as well as line-length changes from USGS Geodolite and two-color laser trilateration observations, to determine a self-consistent set of geodetic data for the earthquake. These combined displacements are modeled by an elastic dislocation representation of the primary fault rupture planes. On average, the model residuals are about twice the estimated measurement errors.

Publisher

Seismological Society of America (SSA)

Subject

Geochemistry and Petrology,Geophysics

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