气候变化领域集成服务门户(CCPortal): Crustal and uppermost mantle S-wave velocity structure beneath the Japanese islands from seismic ambient noise tomography

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DOI	10.1093/gji/ggs121
	Crustal and uppermost mantle S-wave velocity structure beneath the Japanese islands from seismic ambient noise tomography
	Guo, Zhi; Gao, Xing; Shi, Heng; Wang, Weiming
通讯作者	Guo, Z (通讯作者)
发表日期	2013
ISSN	0956-540X
EISSN	1365-246X
起始页码	394
结束页码	406
卷号	193 期号:1
英文摘要	In this study, the crustal and uppermost mantle shear wave velocities beneath the Japanese islands have been determined by inversion from seismic ambient noise tomography using data recorded at 75 Full Range Seismograph Network of Japan broad-band seismic stations, which are uniformly distributed across the Japanese islands. By cross-correlating 2 yr of vertical component seismic ambient noise recordings, we are able to extract Rayleigh wave empirical Green's functions, which are subsequently used to measure phase velocity dispersion in the period band of 6-50 s. The dispersion data are then inverted to yield 2-D tomographic phase velocity maps and 3-D shear wave velocity models. Our results show that the velocity variations at short periods (similar to 10 s), or in the uppermost crust, correlate well with the major known surface geological and tectonic features. In particular, the distribution of low-velocity anomalies shows good spatial correlation with active faults, volcanoes and terrains of sediment exposure, whereas the high-velocity anomalies are mainly associated with the mountain ranges. We also observe that large upper crustal earthquakes (5.0 <= M <= 8.0, depth <= 25 kin) mainly occurred in low-velocity anomalies or along the boundary between low- and high-velocity anomalies, suggesting that large upper crustal earthquakes do not strike randomly or uniformly; rather they are inclined to nucleate within or adjacent to low-velocity areas.
关键词	SUBDUCTION ZONE 2-STATION ANALYSIS ARRAY TOMOGRAPHY DEEP-STRUCTURE FORE-ARC RAYLEIGH PHASE RESOLUTION SLAB CONSTRAINTS
英文关键词	Interferometry; Surface waves and free oscillations; Seismic tomography; Crustal structure
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000317170200028
来源期刊	GEOPHYSICAL JOURNAL INTERNATIONAL
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/258133
推荐引用方式 GB/T 7714	Guo, Zhi,Gao, Xing,Shi, Heng,et al. Crustal and uppermost mantle S-wave velocity structure beneath the Japanese islands from seismic ambient noise tomography[J]. 中国科学院青藏高原研究所,2013,193(1).
APA	Guo, Zhi,Gao, Xing,Shi, Heng,&Wang, Weiming.(2013).Crustal and uppermost mantle S-wave velocity structure beneath the Japanese islands from seismic ambient noise tomography.GEOPHYSICAL JOURNAL INTERNATIONAL,193(1).
MLA	Guo, Zhi,et al."Crustal and uppermost mantle S-wave velocity structure beneath the Japanese islands from seismic ambient noise tomography".GEOPHYSICAL JOURNAL INTERNATIONAL 193.1(2013).