The Coso geothermal area: A laboratory for advanced MEQ studies for geothermal monitoring
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Abstract
The permanent 16-station network of three-component digital seismometers at the Coso geothermal area, California, supplemented by 14 temporary instruments deployed in connection with the DOE Enhanced Geothermal Systems (EGS) Project, provides high-quality microearthquake (MEQ) recordings that are well suited to monitoring a producing geothermal area. We are currently using these data to investigate structure and active processes within the geothermal reservoir by applying three advanced methods: a) high-precision MEQ hypocenter location; b) time-dependent tomography; c) complete (moment tensor) MEQ source mechanism determination. Preliminary results to date resolve seismogenic structures in the producing field more clearly than is possible with conventional earthquake-location techniques. A shallow part of the producing field shows clear changes in the ratio of the seismic wave speeds, Vp/Vs, between 1996 and 2002, which are probably related to physical changes in the reservoir caused by fluid extraction.
Suggested Citation
Julian, B., Foulger, G., Richards-Dinger, K., 2004, The Coso geothermal area: A laboratory for advanced MEQ studies for geothermal monitoring, in Geothermal Resources Council Transactions, v. 28, Indian Wells, California, United States, August 29-September 1, 2004, p. 403-405.
Study Area
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | The Coso geothermal area: A laboratory for advanced MEQ studies for geothermal monitoring |
| Volume | 28 |
| Year Published | 2004 |
| Language | English |
| Publisher | Geothermal Resources Council |
| Description | 3 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | Geothermal Resources Council Transactions |
| First page | 403 |
| Last page | 405 |
| Conference Title | Geothermal Energy: The Reliable Renewable - Geothermal Resources Council 2004 Annual Meeting, GRC |
| Conference Location | Indian Wells, California, United States |
| Conference Date | August 29-September 1, 2004 |
| Country | United States |
| State | California |
| Other Geospatial | Coso Geothermal Area, Coso Volcanic Field |