The Anderson Reservoir seismic gap - Induced aseismicity?
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Abstract
A persistent 10-km seismicity gap along the Calaveras fault appears to be related to the presence of the Leroy Anderson Reservoir in the Calaveras-Silver Creek fault zones southeast of San Jose, California. A magnitude-4.7 earthquake occurred at a depth of 5 km in the centre of the gap on October 3, 1973. The sequence of immediate aftershocks usually accompanying shallow earthquakes of this magnitude in central California did not occur. A bridge crossing the reservoir near its southeast end has been severely deformed, apparently the result of tectonic creep on the Calaveras fault. The occurrence of creep and absence of small earthquakes along the Calaveras in the vicinity of the reservoir suggest a transition from stick slip to stable sliding, possibly brought about by increased pore pressure.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The Anderson Reservoir seismic gap - Induced aseismicity? |
| Series title | Engineering Geology |
| DOI | 10.1016/0013-7952(76)90025-9 |
| Volume | 10 |
| Issue | 2-4 |
| Year Published | 1976 |
| Language | English |
| Publisher | Elsevier |
| Description | 8 p. |
| First page | 255 |
| Last page | 262 |
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