DOI: 10.1002/2016GL070418
论文题名: Geological structures control on earthquake ruptures: The Mw7.7, 2013, Balochistan earthquake, Pakistan
作者: Vallage A. ; Klinger Y. ; Lacassin R. ; Delorme A. ; Pierrot-Deseilligny M.
刊名: Geophysical Research Letters
ISSN: 0094-8562
EISSN: 1944-8293
出版年: 2016
卷: 43, 期: 19 起始页码: 10155
结束页码: 10163
语种: 英语
英文关键词: Balochistan earthquake
; deformation distribution
; geological structure control
; optical image correlation
; rupture complexity
; surface displacement field
Scopus关键词: Deformation
; Earthquakes
; Geology
; Geometrical optics
; Geophysics
; Optical correlation
; Balochistan
; Deformation distributions
; Geological structures
; Optical image correlation
; Rupture complexity
; Surface displacement
; Faulting
英文摘要: The 2013 Mw7.7 Balochistan earthquake, Pakistan, ruptured the Hoshab fault. Left-lateral motion dominated the deformation pattern, although significant vertical motion is found along the southern part of the rupture. Correlation of high-resolution (2.5 m) optical satellite images provided horizontal displacement along the entire rupture. In parallel, we mapped the ground rupture geometry at 1:500 scale. We show that the azimuth of the ground rupture distributes mainly between two directions, N216° and N259°. The direction N216° matches the direction of preexisting geologic structures resulting from penetrative deformation caused by the nearby Makran subduction. Hence, during a significant part of its rupture, the 2013 Balochistan rupture kept switching between a long-term fault front and secondary branches, in which existence and direction are related to the compressional context. It shows unambiguous direct interactions between different preexisting geologic structures, regional stress, and dynamic-rupture stress, which controlled earthquake propagation path. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990954982&doi=10.1002%2f2016GL070418&partnerID=40&md5=afb370c4d6f8dbc4566adcc7d1abbf43
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9525
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: Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154, CNRS, Paris, France
Recommended Citation:
Vallage A.,Klinger Y.,Lacassin R.,et al. Geological structures control on earthquake ruptures: The Mw7.7, 2013, Balochistan earthquake, Pakistan[J]. Geophysical Research Letters,2016-01-01,43(19).