| Title | Evidence from Teleseismic P-Wave Observations for a Low Velocity Body under the Roosevelt Hot Springs Geothermal Area, Utah |
|---|---|
| Authors | Robinson, R.; Iyer, H. M. |
| Year | 1979 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Geophysics; Teleseismic; USA; Utah; Roosevelt Hot Springs; P Wave; Array; Ray Tracing; 3-D Inversion; Low Velocity; Mineral Mountain; USGS |
| Abstract | Teleseismic P-wave delays were measured in the region of the Roosevelt Hot Springs geothermal area, Utah, using a closely spaced array of 15 seismographs. Average relative delay show a well defined pattern of azimuthal variation of up to 0.3 sec. Interpretation of the data using ray tracing an three dimensional inversion techniques shows the presence of a clearly defined low velocity region extending from a depth of 10 km into the upper mantle, centered under the Mineral Mountains. Signal shape variations observed at some of the stations may be due to diffraction around a smaller low velocity body at a depth of 5 km or less. |