| Abstract: | Although the Hayward fault is a source of major earthquakes, it also creeps or slips aseismically, and has done so steadily for several decades (certainly since 1921 and probably since 1869). Most of the fault creeps between 3 and 6 mm/yr, except for a 4- to 6-km-long segment near its south end that creeps at about 9 mm/yr. We present results of our recent surveys to recover angles and deflection lines established across the fault in the 1960s and 1970s, but unmonitored since. We have added data from more offset cultural features to the long-term creep rate data set and made substantial improvements to the analytical method used to compute offsets. The revised creep rate values improve our knowledge of spatial and temporal variation along the fault. The more accurate revised data has reduced the estimate of the average creep rate along most of the fault from 5.1 mm/yr to 4.6 mm/yr. Creep rates in the 9 mm/yr section near the south end have remained the same. |
| Genre: | USGS Numbered Series |
| ProdID: | 23720 |
| Citation Author: | Lienkaemper, James J.; Galehouse, Jon S. |
| Citation Contributing Office: | Earthquake Science Center, Menlo Park Science Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | 18 p. |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 97-690 |
| Citation Search Results Text: | Revised long-term creep rates on the Hayward Fault, Alameda and Contra Costa Counties, California; 1997; OFR; 97-690; Lienkaemper, James J.; Galehouse, Jon S. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Revised long-term creep rates on the Hayward Fault, Alameda and Contra Costa Counties, California; 1997; OFR; 97-690; Lienkaemper, James J.; Galehouse, Jon S. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1997/0690/report-thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/1997/0690/ |
| Date Other: | Wed, 1 Jul 1998 00:00 -0500 |
| Publisher: | U.S. Geological Survey |
