The earthquake sequence near Danville, California, 1970
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Abstract
Several thousand small earthquakes, with magnitudes ranging up to 4, occurred near Danville, California, during May, June, and July 1970. Seven temporary seismographs were installed near the epicentral region to augment an existing telemetered network within 1 day after the first felt earthquake. The dense concentration of 10 seismographs within 12 km of the seismic activity and the existence of a reversed seismic-refraction profile through the region permitted a very detailed study of this earthquake sequence. Over 400 events with magnitude greater than 0.5 were located with an average accuracy of ±1 km. The main earthquake region was approximately spherical: 1 km in radius, 6 km deep, and centered about 5 km southeast of Danville, 40 km east of San Francisco. Fault-plane solutions indicate that faulting associated with the earthquakes was of the right-lateral strike-slip type, with a strike of N 35°W.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The earthquake sequence near Danville, California, 1970 |
| Series title | Bulletin of the Seismological Society of America |
| DOI | 10.1785/BSSA0610061771 |
| Volume | 61 |
| Issue | 6 |
| Year Published | 1971 |
| Language | English |
| Publisher | Seismological Society of America |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | 24 p. |
| First page | 1771 |
| Last page | 1794 |
| Country | United States |
| State | California |
| City | Danville |
| Other Geospatial | San Francisco Bay |
| Google Analytic Metrics | Metrics page |