气候变化领域集成服务门户(CCPortal): Frequency-Dependent Rupture Characteristics of the 30 October 2016 Mw 6.5 Norcia, Italy Earthquake Inferred From Joint Multi-Scale Slip Inversion

CCPortal

DOI	10.1029/2020JB020706
	Frequency-Dependent Rupture Characteristics of the 30 October 2016 Mw 6.5 Norcia, Italy Earthquake Inferred From Joint Multi-Scale Slip Inversion
	Liu W.; Yao H.; Wei S.
发表日期	2021
ISSN	21699313
卷号	126 期号:5
英文摘要	The relationship between multi-scale rupture characteristics and different frequency contents of the seismic waveforms has been revealed for moderate to great earthquakes by previous researches. To better understand such a relationship, we propose a two-step strategy to perform finite fault inversion in the wavelet domain with multi seismic datasets, involving the seismic observations at both teleseismic and near-field distances. In our two-step strategy, the larger-scale pattern of the seismic rupture is first constrained by using the lower-frequency seismic waveforms and then based on the lower-frequency rupture pattern, the higher-frequency rupture features are obtained by performing inversion with higher-frequency data. We apply this two-step strategy with multi seismic datasets to study the 30 October 2016 Mw 6.5 Norcia, Italy earthquake, which is the largest event of the 2016–2017 central Italy seismic sequence. By analyzing the recovered slip patterns from different frequency bands, we notice the frequency-dependent rupture features of this earthquake. The lower-frequency slip concentrated at the shallower depths above the source, and the higher-frequency slip appeared near the edges of the lower-frequency slip patch, working as “barriers”, due to fault complexities in central Italy. The frequency-dependent slip pattern of the 30 October 2016 Norcia earthquake shows a relation to the unevenly distributed pore fluid pressure, as indicated by Vp/Vs tomography from previous researches. Our results suggest that fault complexities and unevenly distributed fluids contribute to the frequency-dependent rupture of this earthquake. © 2021. American Geophysical Union. All Rights Reserved.
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/187141
作者单位	School of Earth and Space Sciences, Laboratory of Seismology and Physics of Earth’s Interior, University of Science and Technology of China, Hefei, China; Mengcheng National Geophysical Observatory, University of Science and Technology of China, Mengcheng, China; CAS Center for Excellence in Comparative Planetology, University of Science and Technology of China, Hefei, China; Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore; Asian School of the Environment, Nanyang Technological University, Singapore, Singapore
推荐引用方式 GB/T 7714	Liu W.,Yao H.,Wei S.. Frequency-Dependent Rupture Characteristics of the 30 October 2016 Mw 6.5 Norcia, Italy Earthquake Inferred From Joint Multi-Scale Slip Inversion[J],2021,126(5).
APA	Liu W.,Yao H.,&Wei S..(2021).Frequency-Dependent Rupture Characteristics of the 30 October 2016 Mw 6.5 Norcia, Italy Earthquake Inferred From Joint Multi-Scale Slip Inversion.Journal of Geophysical Research: Solid Earth,126(5).
MLA	Liu W.,et al."Frequency-Dependent Rupture Characteristics of the 30 October 2016 Mw 6.5 Norcia, Italy Earthquake Inferred From Joint Multi-Scale Slip Inversion".Journal of Geophysical Research: Solid Earth 126.5(2021).