气候变化领域集成服务门户(CCPortal): Along-Dip Variation in Seismic Radiation of the 2011 Ibaraki-Oki, Japan, Earthquake (Mw 7.9) Inferred Using a Multiple-Period-Band Source Inversion Approach

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DOI	10.1029/2020JB019936
	Along-Dip Variation in Seismic Radiation of the 2011 Ibaraki-Oki, Japan, Earthquake (Mw 7.9) Inferred Using a Multiple-Period-Band Source Inversion Approach
	Kubo H.; Asano K.; Iwata T.; Aoi S.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	To elucidate the spatial variation in period-dependent seismic radiation for the 2011 Ibaraki-oki earthquake (Mw 7.9) in Japan, we applied a multiple-period-band source inversion approach to near-source strong-motion waveforms of this earthquake. We estimated source models of this earthquake in three successive period bands (5–10, 10–25, and 25–50 s) using strong-motion data and Green's functions based on a 3-D velocity structure model. The source models in the period bands of 10–25 and 25–50 s had large slips in the area to the south and southeast of the hypocenter in the depth range of 23–35 km, while the large slip area for the source model in the period band of 5–10 s was located in the deeper region ~30 km west of the hypocenter in the depth range of 35–45 km. These results indicate that long-period (10–25 and 25–50 s) and short-period (5–10 s) seismic waves were predominantly radiated from these different regions along the dip direction during the 2011 Ibaraki-oki earthquake. This along-dip variation in the dominant period of seismic radiation can be explained by the variation in scale in unstable sliding patches according to depth. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	along-dip variation in seismic radiation; large interplate earthquake; multiple-period-band source inversion approach; the 2011 Ibaraki-oki earthquake
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/187585
作者单位	National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan; Disaster Prevention Research Institute, Kyoto University, Uji, Japan
推荐引用方式 GB/T 7714	Kubo H.,Asano K.,Iwata T.,et al. Along-Dip Variation in Seismic Radiation of the 2011 Ibaraki-Oki, Japan, Earthquake (Mw 7.9) Inferred Using a Multiple-Period-Band Source Inversion Approach[J],2020,125(10).
APA	Kubo H.,Asano K.,Iwata T.,&Aoi S..(2020).Along-Dip Variation in Seismic Radiation of the 2011 Ibaraki-Oki, Japan, Earthquake (Mw 7.9) Inferred Using a Multiple-Period-Band Source Inversion Approach.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Kubo H.,et al."Along-Dip Variation in Seismic Radiation of the 2011 Ibaraki-Oki, Japan, Earthquake (Mw 7.9) Inferred Using a Multiple-Period-Band Source Inversion Approach".Journal of Geophysical Research: Solid Earth 125.10(2020).