气候变化领域集成服务门户(CCPortal): Three-dimensional paganica fault morphology obtained from hypocenter clustering (L'Aquila 2009 seismic sequence, Central Italy)

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DOI	10.1016/j.tecto.2021.228756
	Three-dimensional paganica fault morphology obtained from hypocenter clustering (L'Aquila 2009 seismic sequence, Central Italy)
	Brunsvik B.; Morra G.; Cambiotti G.; Chiaraluce L.; Di Stefano R.; De Gori P.; Yuen D.A.
发表日期	2021
ISSN	00401951
卷号	804
英文摘要	In seismic modelling, fault planes are normally assumed to be flat due to the lack of data which can constrain fault morphology. However, incorporating 3D fault morphology is important for modelling several phenomena, for example calculating mainshock induced stress changes. We utilize a data-analytical method to unveil the 3D rupture morphology of faults using unsupervised clustering techniques applied to earthquake hypocenters in seismic sequences. We apply this method to the 2009 L'Aquila seismic sequence which involved a MW 6.1 mainshock on April 6th. We use a dataset of about 50,000 relocated events, mostly microearthquakes, reaching magnitude of completeness equal to 0.7. Clustering distinguishes the earthquakes as occurring in three main clusters along with other minor fault segments. We then represent the morphology of the main Paganica fault system (responsible for the largest mainshock) using splines. This method shows promise as a step toward robustly and quickly obtaining 3D rupture morphologies where earthquake sequences have been monitored. The 3D model is presented interactively online, and the processing is presented in an interactive Jupyter Notebook (https://bit.ly/2MnCFdj). © 2021 Elsevier B.V.
关键词	Clustering Fault morphology L'Aquila earthquake sequence
英文关键词	3D modeling; Faulting; Morphology; Structural geology; Analytical method; Earthquake sequences; Induced stress; Micro-earthquakes; Paganica faults; Seismic modelling; Seismic sequence; Unsupervised clustering technique; Earthquakes; earthquake event; earthquake hypocenter; earthquake rupture; fault geometry; seismicity; three-dimensional modeling; unsupervised classification; Abruzzi; Italy; L'Aquila; Paganica; Aquila
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207949
作者单位	School of Geosciences, University of Louisiana at LafayetteLA 70504, United States; Department of Earth Science, University of California Santa BarbaraCA 93106, United States; Department of Physics, University of Louisiana at LafayetteLA 70504, United States; Department of Earth Sciences, University of Milan, Via Cicognara 7, Milano, 20133, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata, Rome, 605 00143, Italy; Dept. of Earth Sciences and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, MN 55455, United States; Dept. of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10026, United States
推荐引用方式 GB/T 7714	Brunsvik B.,Morra G.,Cambiotti G.,et al. Three-dimensional paganica fault morphology obtained from hypocenter clustering (L'Aquila 2009 seismic sequence, Central Italy)[J],2021,804.
APA	Brunsvik B..,Morra G..,Cambiotti G..,Chiaraluce L..,Di Stefano R..,...&Yuen D.A..(2021).Three-dimensional paganica fault morphology obtained from hypocenter clustering (L'Aquila 2009 seismic sequence, Central Italy).Tectonophysics,804.
MLA	Brunsvik B.,et al."Three-dimensional paganica fault morphology obtained from hypocenter clustering (L'Aquila 2009 seismic sequence, Central Italy)".Tectonophysics 804(2021).