气候变化领域集成服务门户(CCPortal): Focal depths and mechanisms of Tohoku-Oki aftershocks from teleseismic P wave modeling

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DOI	10.1007/s11589-013-0036-x
	Focal depths and mechanisms of Tohoku-Oki aftershocks from teleseismic P wave modeling
	Bai, Ling; Luna, Lorena Medina; Hetland, Eric A.; Ritsema, Jeroen
通讯作者	Bai, L (通讯作者)
发表日期	2014
ISSN	1674-4519
EISSN	1867-8777
起始页码	1
结束页码	13
卷号	27 期号:1
英文摘要	Aftershocks of the 2011 Tohoku-Oki great earthquake have a wide range of focal depths and fault plane mechanisms. We constrain the focal depths and focal mechanisms of 69 aftershocks with M-w > 5.4 by modeling the waveforms of teleseismic P and its trailing near-surface reflections pP and sP. We find that the thrust events'' are within 10 km from the plate interface. The dip angles of these thrust events increase with depth from similar to 5 degrees to similar to 25 degrees. The non-thrust events'' vary from 60 km above to 40 km below the plate interface. Normal and strike-slip events within the overriding plate point to redistribution of stress following the primary great earthquake; however, due to the spatially variable stress change in the Tohoku-Oki earthquake, an understanding of how the mainshock affected the stresses that led to the aftershocks requires accurate knowledge of the aftershock location.
关键词	M-W 9.0 PACIFIC COAST SOURCE REGION EARTHQUAKE STRESS SLIP SEQUENCE RUPTURE ARC
英文关键词	Tohoku-Oki aftershocks; Focal depths; Focal mechanisms; Coseismic stress change
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000210066600001
来源期刊	EARTHQUAKE SCIENCE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258297
推荐引用方式 GB/T 7714	Bai, Ling,Luna, Lorena Medina,Hetland, Eric A.,et al. Focal depths and mechanisms of Tohoku-Oki aftershocks from teleseismic P wave modeling[J]. 中国科学院青藏高原研究所,2014,27(1).
APA	Bai, Ling,Luna, Lorena Medina,Hetland, Eric A.,&Ritsema, Jeroen.(2014).Focal depths and mechanisms of Tohoku-Oki aftershocks from teleseismic P wave modeling.EARTHQUAKE SCIENCE,27(1).
MLA	Bai, Ling,et al."Focal depths and mechanisms of Tohoku-Oki aftershocks from teleseismic P wave modeling".EARTHQUAKE SCIENCE 27.1(2014).