DOI: 10.1002/grl.50933
论文题名: Permanently enhanced dynamic triggering probabilities as evidenced by two M ≥ 7.5 earthquakes
作者: Gomberg J.
刊名: Geophysical Research Letters
ISSN: 0094-8537
EISSN: 1944-8268
出版年: 2013
卷: 40, 期: 18 起始页码: 4828
结束页码: 4833
语种: 英语
英文关键词: dynamic triggering
; focusing
; Queen Charlotte Fault
; wavefield
; waveguide
Scopus关键词: Accretionary prism
; Dynamic triggering
; Geologic structures
; Seismic activity
; Source effects
; Subduction zones
; Triggered Earthquakes
; Wavefields
; Focusing
; Probability
; Sedimentology
; Transform faults
; Waveguides
; Earthquakes
; earthquake trigger
; fault
; seismic anisotropy
; subduction
; trough
; Alaska
; British Columbia
; Canada
; Queen Charlotte Islands
; United States
英文摘要: The 2012 M7.7 Haida Gwaii earthquake radiated waves that likely dynamically triggered the 2013 M7.5 Craig earthquake, setting two precedents. First, the triggered earthquake is the largest dynamically triggered shear failure event documented to date. Second, the events highlight a connection between geologic structure, sedimentary troughs that act as waveguides, and triggering probability. The Haida Gwaii earthquake excited extraordinarily large waves within and beyond the Queen Charlotte Trough, which propagated well into mainland Alaska and likely triggering the Craig earthquake along the way. Previously, focusing and associated dynamic triggering have been attributed to unpredictable source effects. This case suggests that elevated dynamic triggering probabilities may exist along the many structures where sedimentary troughs overlie major faults, such as subduction zones' accretionary prisms and transform faults' axial valleys. Although data are sparse, I find no evidence of accelerating seismic activity in the vicinity of the Craig rupture between it and the Haida Gwaii earthquake. © 2013 by the American Geophysical Union. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884199625&doi=10.1002%2fgrl.50933&partnerID=40&md5=639618df1096d774f95486d148eb48a4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5801
Appears in Collections: 气候减缓与适应
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作者单位: U.S. Geological Survey, Seattle, WA 98195, United States
Recommended Citation:
Gomberg J.. Permanently enhanced dynamic triggering probabilities as evidenced by two M ≥ 7.5 earthquakes[J]. Geophysical Research Letters,2013-01-01,40(18).