Chapman, David S.; Harris, Robert N.; Allis, Richard George
Gravity signals at the Geysers geothermal system
Three high-precision gravity and GPS surveys have been conducted over The Geysers geothermal reservoir and surrounding area. These surveys, in September 2000, April 2001, and September 2001, provide an initial baseline for future imaging studies of spatial mass changes from the Santa Rosa Effluent Pipeline currently under construction. Analysis of the three surveys provides a measure of the seasonal and annual gravity and deformation signals currently occurring at The Geysers. GPS results show an average subsidence of 3±2 cm over the production field from September 2000 to April 2001, although some stations have significant deviations from this average.
Geothermal Resources Council
Ground water change; Gravity surveys
Water table -- California; Gravity -- California -- Measurement; Geothermal resources -- California
Gettings, P., Harris, R. N., Allis, R. G., & Chapman, D. S. (2002). Gravity signals at the Geysers geothermal system. Proceedings of the 27th Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA, 8, Jan., 28-30.