W. Thatcher Francis C. Monastero M.A. Hasting C.W. Wicks 2001 <p><span>Observations of deformation from 1992 to 1997 in the southern Coso Range using satellite radar interferometry show deformation rates of up to 35 mm yr</span>⁻¹<span>&nbsp;in an area ∼10 km by 15 km. The deformation is most likely the result of subsidence in an area around the Coso geothermal field. The deformation signal has a short-wavelength component, related to production in the field, and a long-wavelength component, deforming at a constant rate, that may represent a source of deformation deeper than the geothermal reservoir. We have modeled the long-wavelength component of deformation and inferred a deformation source at ∼4 km depth. The source depth is near the brittle-ductile transition depth (inferred from seismicity) and ∼1.5 km above the top of the rhyolite magma body that was a source for the most recent volcanic eruption in the Coso volcanic field [</span><i>Manley and Bacon</i><span>, 2000]. From this evidence and results of other studies in the Coso Range, we interpret the source to be a leaking deep reservoir of magmatic fluids derived from a crystallizing rhyolite magma body.</span></p> application/pdf 10.1029/2001JB000298 en American Geophysical Union Steady state deformation of the Coso Range, east central California, inferred from satellite radar interferometry article