DOI: 10.1002/2014GL059968
论文题名: The 2013 Okhotsk deep-focus earthquake: Rupture beyond the metastable olivine wedge and thermally controlled rise time near the edge of a slab
作者: Meng L. ; Ampuero J.-P. ; Bürgmann R.
刊名: Geophysical Research Letters
ISSN: 0094-10589
EISSN: 1944-10320
出版年: 2014
卷: 41, 期: 11 起始页码: 3779
结束页码: 3785
语种: 英语
英文关键词: backprojection
; deep-focus earthquake
; thermal instability
Scopus关键词: Phase transitions
; Silicate minerals
; Back-projection
; Back-projection imaging
; Broadband seismograms
; Deep-focus earthquakes
; Frequency-dependent
; Lateral variations
; Phase transformation mechanisms
; Thermal instabilities
; Earthquakes
; earthquake rupture
; olivine
; seismic survey
; shear stress
; slab
; thermal structure
; Khabarovsk [Russian Federation]
; Okhotsk
; Russian Federation
英文摘要: The 2013 M8.3 Okhotsk earthquake involves two primary mechanisms of deep-focus earthquake rupture, mineral phase transformation of olivine to spinel and thermal shear instability. Backprojection imaging of broadband seismograms recorded by the North American and European networks indicates bilateral rupture toward NE and SSE. The rupture paths of the NE segment and other regional M7 earthquakes are confined in narrow regions along the slab contours, consistent with the phase transformation mechanism. However, the SSE rupture propagates a long distance across the slab and aftershocks are distributed across a ~60 km wide zone, beyond the plausible thickness of the metastable olivine wedge, favoring thermal shear weakening. While the NE rupture is only visible at high frequencies, the SSE rupture is consistently observed across a broad-frequency range. This frequency-dependent rupture mode can be explained by lateral variations of rise time controlled by thermal thinning of the slab near its northern end. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901731656&doi=10.1002%2f2014GL059968&partnerID=40&md5=5e924606777e3b78cd25451e8a257227
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7853
Appears in Collections: 气候减缓与适应
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作者单位: Earth, Planetary and Space Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Meng L.,Ampuero J.-P.,Bürgmann R.. The 2013 Okhotsk deep-focus earthquake: Rupture beyond the metastable olivine wedge and thermally controlled rise time near the edge of a slab[J]. Geophysical Research Letters,2014-01-01,41(11).