气候变化领域集成服务门户(CCPortal): 3-D Intrinsic and Scattering Seismic Attenuation Structures Beneath Kyushu, Japan

CCPortal

DOI	10.1029/2019JB018742
	3-D Intrinsic and Scattering Seismic Attenuation Structures Beneath Kyushu, Japan
	Shito A.; Matsumoto S.; Ohkura T.; Shimizu H.; Sakai S.; Iio Y.; Takahashi H.; Yakiwara H.; Watanabe T.; Kosuga M.; Okada T.; Yoshimi M.; Asano Y.
发表日期	2020
ISSN	21699313
卷号	125 期号:8
英文摘要	The attenuation of seismic wave energy is caused by intrinsic absorption and scattering. The former involves the conversion of seismic wave energy to heat energy via internal friction due to the anelasticity of the medium, whereas the latter involves the scattering of seismic wave energy due to random elastic heterogeneities in the medium. Quantifying both intrinsic ((Formula presented.)) and scattering ((Formula presented.)) attenuation is therefore important for understanding the physical properties of the Earth's interior and predicting seismic wave propagation. Here we develop a new procedure to separately map three-dimensional (3-D) (Formula presented.) and (Formula presented.) structures. The path-averaged (Formula presented.) and (Formula presented.) values are obtained via an envelope-fitting approach that employs a multiple-scattering model. The path-averaged (Formula presented.) and (Formula presented.) structures are then mapped into 3-D space using a tomographic inversion technique based on sensitivity kernels, which are calculated from a Monte Carlo simulation of the radiative transfer equations. We apply this method to map the crustal structure beneath Kyushu, Japan, and obtain 3-D (Formula presented.) and (Formula presented.) structures for the 1–2, 2–4, and 4–8 Hz frequency bands. The spatial attenuation patterns are similar for each of the analyzed frequency bands, with the spatial variability in (Formula presented.) being more pronounced than that in (Formula presented.). The high- (Formula presented.) and (Formula presented.) regions correspond to the locations of active volcanoes. Conversely, the northern Kyushu area possesses low- (Formula presented.) and (Formula presented.) zones that correspond to low heat flow and Cretaceous granite, respectively. The overall (Formula presented.) and (Formula presented.) distributions correlate with thermal and geological structures, respectively. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	crust; intrinsic attenuation; Kyushu; scattering attenuation
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187720
作者单位	Institute of Seismology and Volcanology, Kyushu University, Fukuoka, Japan; Now at Faculty of Biosphere-Geosphere Science, Okayama University of Science, Okayama, Japan; Aso Volcanological Laboratory, Institute for Geothermal Science, Kyoto University, Aso, Japan; Earthquake Research Institute, The University of Tokyo, Tokyo, Japan; Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan; Institute of Seismology and Volcanology, Hokkaido University, Sapporo, Japan; Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan; Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan; Graduate School of Science, Tohoku University, Sendai, Japan; Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan; National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan
推荐引用方式 GB/T 7714	Shito A.,Matsumoto S.,Ohkura T.,et al. 3-D Intrinsic and Scattering Seismic Attenuation Structures Beneath Kyushu, Japan[J],2020,125(8).
APA	Shito A..,Matsumoto S..,Ohkura T..,Shimizu H..,Sakai S..,...&Asano Y..(2020).3-D Intrinsic and Scattering Seismic Attenuation Structures Beneath Kyushu, Japan.Journal of Geophysical Research: Solid Earth,125(8).
MLA	Shito A.,et al."3-D Intrinsic and Scattering Seismic Attenuation Structures Beneath Kyushu, Japan".Journal of Geophysical Research: Solid Earth 125.8(2020).