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DOI: 10.1002/2016GL071104
论文题名:
Regional and stress drop effects on aftershock productivity of large megathrust earthquakes
作者: Wetzler N.; Brodsky E.E.; Lay T.
刊名: Geophysical Research Letters
ISSN: 0094-8327
EISSN: 1944-8058
出版年: 2016
卷: 43, 期:23
起始页码: 12012
结束页码: 12020
语种: 英语
英文关键词: aftershock productivity ; megathrust earthquakes ; radiated energy ; rupture area ; static stress drop
Scopus关键词: Drops ; Earthquake effects ; Faulting ; Geophysics ; Productivity ; Megathrust earthquakes ; Productivity increase ; Radiated energies ; Regional environments ; Rupture areas ; Source rupture process ; Static stress ; Subduction zones ; Earthquakes
英文摘要: The total number of aftershocks increases with main shock magnitude, resulting in an overall well-defined relationship. Observed variations from this trend prompt questions regarding influences of regional environment and individual main shock rupture characteristics. We investigate how aftershock productivity varies regionally and with main shock source parameters for large (Mw ≥ 7.0) circum-Pacific megathrust earthquakes within the past 25 years, drawing on extant finite-fault rupture models. Aftershock productivity is found to be higher for subduction zones of the western circum-Pacific than for subduction zones in the eastern circum-Pacific. This appears to be a manifestation of differences in faulting susceptibility between island arcs and continental arcs. Surprisingly, events with relatively large static stress drop tend to produce fewer aftershocks than comparable magnitude events with lower stress drop; however, for events with similar coseismic rupture area, aftershock productivity increases with stress drop and radiated energy, indicating a significant impact of source rupture process on productivity. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007388080&doi=10.1002%2f2016GL071104&partnerID=40&md5=27d5d90347873af8ee63000d5253c83d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9290
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: Department of Earth and Planetary Sciences, University of California, Santa Cruz, CA, United States

Recommended Citation:
Wetzler N.,Brodsky E.E.,Lay T.. Regional and stress drop effects on aftershock productivity of large megathrust earthquakes[J]. Geophysical Research Letters,2016-01-01,43(23).
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