HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (11) Citing Articles via Google Scholar Google Scholar Articles by Lienkaemper, J. J. Articles by Schwartz, D. P. Search for Related Content GeoRef GeoRef Citation

A Record of Large Earthquakes on the Southern Hayward Fault for the Past 500 Years

U.S. Geological Survey 977
Menlo Park, California 94025
jlienk{at}usgs.gov
(J.L., T.D., D.S.)

U.S. Geological Survey
MS 966, Denver Federal Center
Denver, Colorado 80225
(S.P.)

Lawrence Livermore National Laboratory
Livermore, California 94551
(G.S.)

Department of Geography
University of California, Berkeley, California 94720
(L.R.)

The Hayward fault, a major branch of the right-lateral San Andreas fault system, traverses the densely populated eastern San Francisco Bay region, California. We conducted a paleoseismic investigation to better understand the Hayward fault's past earthquake behavior. The site is near the south end of Tyson's Lagoon, a sag pond formed in a right step of the fault in Fremont. Because the Hayward fault creeps at the surface, we identified paleoseismic events using features that we judge to be unique to ground ruptures or the result of strong ground motion, such as the presence of fault-scarp colluvial deposits and liquefaction. We correlate the most recent event evidence (E1) to the historical 1868 M 6.9 earthquake that caused liquefaction in the pond and recognize three additional paleoruptures since A.D. 1470 ± 110 yr. Event ages were estimated by chronological modeling, which incorporated historical and stratigraphic information and radiocarbon and pollen data. Modeled, mean age and 95-percentile ranges of the three earlier events are A.D. 1730 (1650-1790) yr (E2), A.D. 1630 (1530-1740) yr (E3), and A.D. 1470 (1360-1580) (E4). The ages of these paleoearthquakes yield a mean recurrence of 130 ± 40 yr. Although the mean recurrence is well determined for the period A.D. 1470-1868, individual intervals are less well determined: E1-E2, 140 +80/-70 yr; E2-E3, 100 +90/-100 yr; and E3-E4, 150 +130/-110 yr.

This article has been cited by other articles:

				E.L. Simpson, M.C. Wizevich, H.L. Hilbert-Wolf, S.E. Tindall, J.J. Bernard, and W.S. Simpson An Upper Cretaceous sag pond deposit: Implications for recognition of local seismicity and surface rupture along the Kaibab monocline, Utah Geology, November 1, 2009; 37(11): 967 - 970. [Abstract] [Full Text] [PDF]

				S. Harmsen, S. Hartzell, and P. Liu Simulated Ground Motion in Santa Clara Valley, California, and Vicinity from M>=6.7 Scenario Earthquakes Bulletin of the Seismological Society of America, June 1, 2008; 98(3): 1243 - 1271. [Abstract] [Full Text] [PDF]

				J. J. Lienkaemper and P. L. Williams A Record of Large Earthquakes on the Southern Hayward Fault for the Past 1800 Years Bulletin of the Seismological Society of America, December 1, 2007; 97(6): 1803 - 1819. [Abstract] [Full Text] [PDF]

				J. L. Hardebeck, A. J. Michael, and T. M. Brocher Seismic Velocity Structure and Seismotectonics of the Eastern San Francisco Bay Region, California Bulletin of the Seismological Society of America, June 1, 2007; 97(3): 826 - 842. [Abstract] [Full Text] [PDF]

				L. R. Sykes and W. Menke Repeat Times of Large Earthquakes: Implications for Earthquake Mechanics and Long-Term Prediction Bulletin of the Seismological Society of America, October 1, 2006; 96(5): 1569 - 1596. [Abstract] [Full Text] [PDF]

				N. A. Toke, J R. Arrowsmith, J. J. Young, and C. J. Crosby Paleoseismic and Postseismic Observations of Surface Slip along the Parkfield Segment of the San Andreas Fault Bulletin of the Seismological Society of America, September 1, 2006; 96(4B): S221 - S238. [Abstract] [Full Text] [PDF]

				S. Hecker, H. Kelsey, H. AbramsonWard, J. Bawcom, J. Boatwright, T. Crampton, W. Goldberg, K. L. Hanson, V. E. Langenheim, M. Larsen, et al. History and pre-history of earthquakes in wine and redwood country, Sonoma and Mendocino counties, California Field Guides, April 1, 2006; 7(0): 339 - 372. [Abstract] [Full Text] [PDF]

				S. Hecker, D. Pantosti, D. P. Schwartz, J. C. Hamilton, L. M. Reidy, and T. J. Powers The Most Recent Large Earthquake on the Rodgers Creek Fault, San Francisco Bay Area Bulletin of the Seismological Society of America, June 1, 2005; 95(3): 844 - 860. [Abstract] [Full Text] [PDF]