Seismic reflection evidence for a northeast-dipping Hayward fault near Fremont, California: Implications for seismic hazard
Geophysical Research Letters
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Abstract
A 1.6-km-long seismic reflection profile across the creeping trace of the southern Hayward fault near Fremont, California, images the fault to a depth of 650 m. Reflector truncations define a fault dip of about 70 degrees east in the 100 to 650 m depth range that projects upward to the creeping surface trace, and is inconsistent with a nearly vertical fault in this vicinity as previously believed. This fault projects to the Mission seismicity trend located at 4-10 km depth about 2 km east of the surface trace and suggests that the southern end of the fault is as seismically active as the part north of San Leandro. The seismic hazard implication is that the Hayward fault may have a more direct connection at depth with the Calaveras fault, affecting estimates of potential event magnitudes that could occur on the combined fault surfaces, thus affecting hazard assessments for the south San Francisco Bay region.
Suggested Citation
Williams, R.A., Simpson, R., Jachens, R., Stephenson, W.J., Odum, J.K., and Ponce, D., 2005, Seismic reflection evidence for a northeast-dipping Hayward fault near Fremont, California: Implications for seismic hazard: Geophysical Research Letters, v. 32, no. 13, p. 1-4, https://doi.org/10.1029/2005GL023113.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Seismic reflection evidence for a northeast-dipping Hayward fault near Fremont, California: Implications for seismic hazard |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2005GL023113 |
| Volume | 32 |
| Issue | 13 |
| Publication Date | July 02, 2005 |
| Year Published | 2005 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geophysical Research Letters |
| First page | 1 |
| Last page | 4 |