DOI: 10.1002/2016GL071113
论文题名: Reconciling seismicity and geodetic locking depths on the Anza section of the San Jacinto fault
作者: Jiang J. ; Fialko Y.
刊名: Geophysical Research Letters
ISSN: 0094-8508
EISSN: 1944-8239
出版年: 2016
卷: 43, 期: 20 起始页码: 10663
结束页码: 10671
语种: 英语
英文关键词: aseismic transients
; earthquake rupture
; fault mechanics
; geodetic locking
; rate-and-state friction
; seismicity
Scopus关键词: Earthquakes
; Faulting
; Forecasting
; Friction
; Geodesy
; Geophysics
; Seismic waves
; Stochastic models
; Stochastic systems
; Transients
; Earthquake rupture
; Fault mechanics
; Geodetic locking
; Rate and state friction
; Seismicity
; Locks (fasteners)
英文摘要: Observations from the Anza section of the San Jacinto Fault in Southern California reveal that microseismicity extends to depths of 15–18 km, while the geodetically determined locking depth is less than ~10 km. This contrasts with observations from other major faults in the region and also with predictions of fault models assuming a simple layered distribution of frictional properties with depth. We suggest that an anomalously shallow geodetic fault locking may result from a transition zone at the bottom of seismogenic layer with spatially heterogeneous frictional properties. Numerical models of faults that incorporate stochastic heterogeneity at transitional depths successfully reproduce the observed depth relation between seismicity and geodetic locking, as well as complex spatiotemporal patterns of microseismicity with relatively scarce repeating earthquakes. Our models predict propagation of large earthquakes to the bottom of the transition zone, and ubiquitous aseismic transients below the locked zone, potentially observable using high-precision geodetic techniques. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84992343462&doi=10.1002%2f2016GL071113&partnerID=40&md5=2b57f6d1cbd5ce63992049dc50de6cf9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9471
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States
Recommended Citation:
Jiang J.,Fialko Y.. Reconciling seismicity and geodetic locking depths on the Anza section of the San Jacinto fault[J]. Geophysical Research Letters,2016-01-01,43(20).