DOI: 10.1002/2014GL060318
论文题名: Paleoearthquakes at Frazier Mountain, California delimit extent and frequency of past San Andreas Fault ruptures along 1857 trace
作者: Scharer K. ; Weldon II R. ; Streig A. ; Fumal T.
刊名: Geophysical Research Letters
ISSN: 0094-10017
EISSN: 1944-9748
出版年: 2014
卷: 41, 期: 13 起始页码: 4527
结束页码: 4534
语种: 英语
英文关键词: Big Bend
; paleoseismology
; rupture history
; southern San Andreas Fault
Scopus关键词: Strike-slip faults
; Behavior model
; Big Bend
; Large earthquakes
; Paleoearthquake
; Paleoseismology
; Rupture length
; San Andreas fault
; Surface ruptures
; Earthquakes
英文摘要: Large earthquakes are infrequent along a single fault, and therefore historic, well-characterized earthquakes exert a strong influence on fault behavior models. This is true of the 1857 Fort Tejon earthquake (estimated M7.7-7.9) on the southern San Andreas Fault (SSAF), but an outstanding question is whether the 330 km long rupture was typical. New paleoseismic data for six to seven ground-rupturing earthquakes on the Big Bend of the SSAF restrict the pattern of possible ruptures on the 1857 stretch of the fault. In conjunction with existing sites, we show that over the last ~650 years, at least 75% of the surface ruptures are shorter than the 1857 earthquake, with estimated rupture lengths of 100 to <300 km. These results suggest that the 1857 rupture was unusual, perhaps leading to the long open interval, and that a return to pre-1857 behavior would increase the rate of M7.3-M7.7 earthquakes. Key Points New paleoearthquake site fills in 200 km span with scant data Frequency of 1857 size earthquakes limited to 25% since 1350 A.D. Length of previous ruptures variable, M7-M7.7 events most common ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904073866&doi=10.1002%2f2014GL060318&partnerID=40&md5=72e9e490ecbd10f2ae8f200d302cf093
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7281
Appears in Collections: 气候减缓与适应
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作者单位: Earthquake Science Center, U.S. Geological Survey, Pasadena CA, United States
Recommended Citation:
Scharer K.,Weldon II R.,Streig A.,et al. Paleoearthquakes at Frazier Mountain, California delimit extent and frequency of past San Andreas Fault ruptures along 1857 trace[J]. Geophysical Research Letters,2014-01-01,41(13).