DOI: 10.1002/2014GL061916
论文题名: Global and along-strike variations of source duration and scaling for intermediate-depth and deep-focus earthquakes
作者: Poli P. ; Prieto G.
刊名: Geophysical Research Letters
ISSN: 0094-9561
EISSN: 1944-9292
出版年: 2014
卷: 41, 期: 23 起始页码: 8315
结束页码: 8324
语种: 英语
英文关键词: deep-focus earthquakes
; earthquake scaling
; intermediate-depth earthquakes
; rupture duration
; source time function
Scopus关键词: Deep-focus earthquakes
; Earthquake magnitudes
; Geophysical evidence
; Intermediate-depth earthquakes
; Physical mechanism
; Rupture duration
; Source time functions
; Teleseismic distances
; Earthquakes
; earthquake event
; estimation method
; geophysical method
; plate tectonics
; rupture
; seismic data
; strike (geology)
; subduction zone
; tectonic setting
; teleseismic wave
英文摘要: The systematic behavior of earthquake rupture as a function of earthquake magnitude and/or tectonic setting is a key in our understanding of the physical mechanisms involved during earthquake rupture. Geophysical evidence suggests that although deep earthquakes - including intermediate-depth and deep - are similar to shallow ones, the mechanism involved during deep earthquakes is different from that of shallow ones. In particular, the magnitude and depth dependence of scaled duration, a measure of earthquake rupture duration, has led to controversy of what controls deep earthquake behavior. Here we estimate scaled source durations for 600 intermediate-depth and deep-focus earthquakes recorded at teleseismic distances and show deviation from self-similar scaling. No depth dependence is observed which we interpret as due to little differences between intermediate-depth and deep-focus earthquake mechanisms. The data show no correlation between durations and plate age or thermal parameters, suggesting that the thermal properties of the plate have little effect on source durations. We nevertheless report differences in average source duration and scaling between subduction zones and along-strike variations of source durations that more closely resemble the geometry of subduction (flat or steep subduction) rather than plate age. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921610522&doi=10.1002%2f2014GL061916&partnerID=40&md5=647494d5ae9c7600a34b71beab326505
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6825
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
Recommended Citation:
Poli P.,Prieto G.. Global and along-strike variations of source duration and scaling for intermediate-depth and deep-focus earthquakes[J]. Geophysical Research Letters,2014-01-01,41(23).