气候变化领域集成服务门户(CCPortal): The 3-D Spatial Distribution of Shear Strain Energy Changes Associated With the 2016 Kumamoto Earthquake Sequence; Southwest Japan

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DOI	10.1029/2019GL086369
	The 3-D Spatial Distribution of Shear Strain Energy Changes Associated With the 2016 Kumamoto Earthquake Sequence; Southwest Japan
	Noda A.; Saito T.; Fukuyama E.; Terakawa T.; Tanaka S.; Matsu'ura M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Shear strain energy is an essential physical quantity governing earthquake generation. To calculate the shear strain energy changes due to an earthquake, we need both coseismic stress changes and background crustal stress. The orientation of the background stress can be estimated from earthquake focal mechanisms, but its absolute level is still uncertain. Assuming the level of the background deviatoric stress to be frictional strength in the crust, we evaluated the three-dimensional distribution of shear strain energy changes associated with the 2016 Kumamoto earthquake sequence, southwest Japan. Its spatial patterns strongly depend on the background stress level. From the energy balance of shear faulting, we proposed that the volume integral of the shear strain energy changes could constrain the background deviatoric stress level. It should be >14 MPa at 10-km depth at the very least. We showed that approximately 75% of aftershocks occurred where the shear strain energy increased. ©2020. The Authors.
英文关键词	Earthquakes; Strain energy; Stresses; Deviatoric stress; Earthquake focal mechanisms; Earthquake sequences; Frictional strength; GNSS displacement data; Physical quantities; Stress changes; Stress levels; Shear strain; coseismic process; crustal structure; earthquake magnitude; energy balance; focal mechanism; GNSS; shear strain; spatial distribution; three-dimensional modeling; Japan
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/170780
作者单位	National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan; Graduate School of Engineering, Kyoto University, Kyoto, Japan; Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Institute of Statistical Mathematics, Tachikawa, Japan
推荐引用方式 GB/T 7714	Noda A.,Saito T.,Fukuyama E.,et al. The 3-D Spatial Distribution of Shear Strain Energy Changes Associated With the 2016 Kumamoto Earthquake Sequence; Southwest Japan[J],2020,47(3).
APA	Noda A.,Saito T.,Fukuyama E.,Terakawa T.,Tanaka S.,&Matsu'ura M..(2020).The 3-D Spatial Distribution of Shear Strain Energy Changes Associated With the 2016 Kumamoto Earthquake Sequence; Southwest Japan.Geophysical Research Letters,47(3).
MLA	Noda A.,et al."The 3-D Spatial Distribution of Shear Strain Energy Changes Associated With the 2016 Kumamoto Earthquake Sequence; Southwest Japan".Geophysical Research Letters 47.3(2020).