NDLI: Spectral element analysis on the characteristics of seismic wave propagation triggered by Wenchuan M $

Content Provider	Springer Nature Link
Author	Yan, ZhenZhen Zhang, Huai Yang, ChangChun Shi, YaoLin
Copyright Year	2009
Abstract	The 2008 Wenchuan earthquake occurred in an active earthquake zone, i.e., Longmenshan tectonic zone. Seismic waves triggered by this earthquake can be used to explore the characteristics of the fault rupture process and the hierarchical structure of the Earth’s interior. We employ spectral element method incorporated with large-scale parallel computing technology, to investigate the characteristics of seismic wave propagation excited by Wenchuan earthquake. We calculate synthetic seismograms with one-point source model and three-point source model respectively. The AK135 model is employed as a prototype of our numerical global Earth model. The Earth’s ellipticity, Earth’s medium attenuation, and topography data are taken into consideration. These wave propagation processes are simulated by solving three-dimensional elastic wave governing equations. Three-dimensional visualization of our numerical results displays the profile of the seismic wave propagation. The three-point source, which is proposed from the latest investigations through field observation and reverse estimation, can better demonstrate the spatial and temporal characteristics of the source rupture process than the one-point source. We take comparison of synthetic seismograms with observational data recorded at 16 observatory stations. Primary results show that the synthetic seismograms calculated from three-point source agree well with the observations. This can further reveal that the source rupture process of Wenchuan earthquake is a multi-rupture process, which is composed by at least three or more stages of rupture processes.
Starting Page	764
Ending Page	773
Page Count	10
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	52
Issue Number	6
e-ISSN	18622801
Language	English
Publisher	SP Science in China Press
Publisher Date	2009-06-12
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	Wenchuan earthquake spectral element method numerical simulation global seismic wave parallel computing Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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