Teleseismic-Seismic Monitoring At Coso Geothermal Area (1998-2002)

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Exploration Activity: Teleseismic-Seismic Monitoring At Coso Geothermal Area (1998-2002)

Exploration Activity Details
Location Coso Geothermal Area
Exploration Technique Teleseismic-Seismic Monitoring
Activity Date 1998 - 2002

Usefulness not indicated
DOE-funding Unknown

 
Notes
Two recent earthquake sequences near the Coso geothermal field show clear evidence of faulting along conjugate planes. Results from analyzing an earthquake sequence occurring in 1998 are presented and compared with a similar sequence that occurred in 1996. The two sequences followed mainshocks that occurred on 27 November, 1996 and 6 March, 1998. Both mainshocks ruptured approximately colocated regions of the same fault system. Following a comparison with the background seismicity of the Coso region, evidence was detected of stress loading within the geothermal field that appears to be in response to the 1998 earthquakes. From an estimate of the tectonic stressing rate on the fault that produced the 1998 sequence, a repeat cycle can be inferred of 135 years for an earthquake of comparable magnitude at the Coso region.


Additional References