Seismic and geodetic studies of the Imperial Valley, California
The Imperial Valley exhibits perhaps the most active current tectonism in the United States; patterns of gravitational and thermal anomalies, along with geodetic measurements, strike-slip faulting, and recent volcanism suggest that the continental crust may still be spreading (Elders et al., 1972). In recent years, the United States Geological Survey and Caltech have added new seismic stations into a dense network in the Imperial Valley to study in detail the relationship between geothermal areas and earthquakes, and to understand the tectonic processes taking place there. The purposes of this study are to: (1) examine crustal structure using recently available data on P-wave arrival times of local earthquakes; (2) examine the leveling data for evidence of tectonic subsidence or uplift; and (3) study correlations between seismicity, seismic velocity, geodetic motion, geothermal activity, and local geology to provide a more consistent picture of the tectonics of the Imperial Valley.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA); California Univ., Los Angeles (USA). Dept. of Earth and Space Sciences
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6075458
- Report Number(s):
- UCRL-15382; ON: DE82001686
- Country of Publication:
- United States
- Language:
- English
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