Abnormal P-wave delays in The Geysers-Clear Lake Geothermal area, California
Science
By: H. M. Iyer, D. H. Oppenheimer, and T. Hitchcock
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Abstract
Large teleseismic delays, exceeding 1 second, are found near Mount Hannah in the Clear Lake volcanic field and in the steam-production area at The Geysers. The delays are superimposed on a general delay field of about 0.5 second extending over the volcanic rocks and the steam reservoir. It is postulated that a magma chamber under the surface volcanic rocks with a core of severely molten rock beneath Mount Hannah and a highly fractured steam reservoir probably underlain by partially molten rock at The Geysers are responsible for the observed delays. Both zones extend to depths of 20 kilometers or more.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Abnormal P-wave delays in The Geysers-Clear Lake Geothermal area, California |
| Series title | Science |
| DOI | 10.1126/science.204.4392.495 |
| Volume | 204 |
| Issue | 4392 |
| Year Published | 1979 |
| Language | English |
| Publisher | American Association for the Advancement of Science |
| Description | 3 p. |
| First page | 495 |
| Last page | 497 |
| Country | United States |
| State | California |
| Other Geospatial | Clear Lake, Mount Hannah |