气候变化领域集成服务门户(CCPortal): The 2018 Mw 7.9 Offshore Kodiak, Alaska, Earthquake: An Unusual Outer Rise Strike-Slip Earthquake

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DOI	10.1029/2019JB019267
	The 2018 Mw 7.9 Offshore Kodiak, Alaska, Earthquake: An Unusual Outer Rise Strike-Slip Earthquake
	Guo R.; Zheng Y.; An C.; Xu J.; Jiang Z.; Zhang L.; Riaz M.S.; Xie J.; Dai K.; Wen Y.
发表日期	2020
ISSN	21699313
卷号	125 期号:5
英文摘要	The rupture process of the 2018 Mw 7.9 offshore Kodiak (Alaska) earthquake is still in hot dispute because of a lack of offshore observations, thus causing difficulties for understanding seismogenic tectonics and tsunami hazards. In this study, teleseismic body waves, high-rate GPS, seismic waves preceding tsunami waves, static GPS, and tsunami data are jointly used to resolve the faulting geometry and coseismic slip distribution of the offshore Kodiak earthquake. Tests of a series of finite fault rupture models illustrate that an optimal five-fault model can reconcile all available data sets well. The results reveal that the asperity on each fault segment is located near the hypocenter, with peak slip of ~7.8 m. The aftershock loci appear to be complementary to the mainshock slips, demonstrating the velocity-strengthening regions that predominantly slip aseismically. Based on a tectonic stress field analysis, we propose that the 2018 Kodiak earthquake is attributed to a combination of enhanced tensional stress following the 1964 Mw 9.2 Alaska earthquake and compressional stress produced by the collision of the Yakutat terrane with North America. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aftershock loci; finite fault rupture model; GPS data; seismic waves; tsunami
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/187876
作者单位	State Key Laboratory of Geodesy and Earth's Dynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, China; State Key Laboratory of Geological Processes and Mineral Resources, School of Geophysics and Geomatics, China University of Geosciences, Wuhan, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China; Southwest Jiaotong University Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China; Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan; Centre for Earthquake Studies, National Centre for Physics, Islamabad, Pakistan; School of Physics, Huazhong University of Science and Technology, Wuhan, China; School of Geodesy and Geomatics, Wuhan University, Wuhan, China
推荐引用方式 GB/T 7714	Guo R.,Zheng Y.,An C.,et al. The 2018 Mw 7.9 Offshore Kodiak, Alaska, Earthquake: An Unusual Outer Rise Strike-Slip Earthquake[J],2020,125(5).
APA	Guo R..,Zheng Y..,An C..,Xu J..,Jiang Z..,...&Wen Y..(2020).The 2018 Mw 7.9 Offshore Kodiak, Alaska, Earthquake: An Unusual Outer Rise Strike-Slip Earthquake.Journal of Geophysical Research: Solid Earth,125(5).
MLA	Guo R.,et al."The 2018 Mw 7.9 Offshore Kodiak, Alaska, Earthquake: An Unusual Outer Rise Strike-Slip Earthquake".Journal of Geophysical Research: Solid Earth 125.5(2020).