Application of Satellite Thermal Infrared Imagery to Geothermal Explor ation in East Central California

The main incentives for use of remote sensing in geothermal exploration are cost-effectiveness and large-area coverage. We analyzed spaceborne thermal infrared (TIR) imagery from the spaceborne ASTER instrument in search for thermal anomalies associated with geothermal resources in the central part of eastern California. We present results from the known geothermal area of the Coso Geothermal Power Project, with emphasis on correction of thermal effects caused by topogr aphy and albedo. Taking these effects into account reduces noise and reveals thermal anomalies which are weak or not distinguishable in the uncorrected imagery. In future work, we will look for similar anomalies in unexplored areas and will seek to validate the remote sensing observations with field measurements.