气候变化领域集成服务门户(CCPortal): High-Density Seismic Refraction Imaging of Plate-Boundary Structures in the Slow Earthquake Gap Zone off Western Kii Peninsula; Nankai Trough

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DOI	10.1029/2020GL089132
	High-Density Seismic Refraction Imaging of Plate-Boundary Structures in the Slow Earthquake Gap Zone off Western Kii Peninsula; Nankai Trough
	Qin Y.; Fujie G.; Kodaira S.; Nakamura Y.; Kaiho Y.; No T.; Obana K.; Miura S.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	Despite recent observations of slow earthquakes along the Nankai subduction zone, none have been reported in the central Nankai Trough between the Kii Channel and Cape Shionomisaki. In November 2018, a very dense array of 96 ocean-bottom seismometers were deployed by JAMSTEC to acquire active-source seismic refraction dataset (supplemented by a multichannel seismic reflection profile) from the seaward side of the subduction trough to the accretionary prism off Cape Shionomisaki. We applied traveltime tomography to the refraction data to constrain the P wave velocity down to the upper mantle, coordinating with a migrated seismic reflection profile to confirm the depth of the Moho and interpret shallower structural features. From a comparison with a transect across the Kumano basin, we conclude that structural and physical differences between these two locations, especially the geometry of the subducting plate surface, lead to different slow earthquake activities. © 2020. The Authors.
英文关键词	Plates (structural components); Refraction; Seismic waves; Wave propagation; Accretionary prism; Earthquake activity; Multichannel seismic reflection profiles; Nankai subduction zone; Ocean bottom seismometer; Seismic reflection profiles; Structural feature; Travel time tomography; Earthquakes
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169151
作者单位	Japan Agency for Marine-Earth Science and Technology, Research Institute in Yokohama, Yokohama, Japan
推荐引用方式 GB/T 7714	Qin Y.,Fujie G.,Kodaira S.,et al. High-Density Seismic Refraction Imaging of Plate-Boundary Structures in the Slow Earthquake Gap Zone off Western Kii Peninsula; Nankai Trough[J],2021,48(3).
APA	Qin Y..,Fujie G..,Kodaira S..,Nakamura Y..,Kaiho Y..,...&Miura S..(2021).High-Density Seismic Refraction Imaging of Plate-Boundary Structures in the Slow Earthquake Gap Zone off Western Kii Peninsula; Nankai Trough.Geophysical Research Letters,48(3).
MLA	Qin Y.,et al."High-Density Seismic Refraction Imaging of Plate-Boundary Structures in the Slow Earthquake Gap Zone off Western Kii Peninsula; Nankai Trough".Geophysical Research Letters 48.3(2021).