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Regional Wave Propagation Using the Discontinuous Galerkin Method : Volume 4, Issue 1 (30/01/2013)

By Wenk, S.

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Book Id: WPLBN0003983890
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: Regional Wave Propagation Using the Discontinuous Galerkin Method : Volume 4, Issue 1 (30/01/2013)  
Author: Wenk, S.
Volume: Vol. 4, Issue 1
Language: English
Subject: Science, Solid, Earth
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Igel, H., Wenk, S., Käser, M., & Pelties, C. (2013). Regional Wave Propagation Using the Discontinuous Galerkin Method : Volume 4, Issue 1 (30/01/2013). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Earth and Environmental Sciences, Geophysics Section, Ludwig-Maximilians-Universität, Munich, Germany. We present an application of the discontinuous Galerkin (DG) method to regional wave propagation. The method makes use of unstructured tetrahedral meshes, combined with a time integration scheme solving the arbitrary high-order derivative (ADER) Riemann problem. This ADER-DG method is high-order accurate in space and time, beneficial for reliable simulations of high-frequency wavefields over long propagation distances. Due to the ease with which tetrahedral grids can be adapted to complex geometries, undulating topography of the Earth's surface and interior interfaces can be readily implemented in the computational domain. The ADER-DG method is benchmarked for the accurate radiation of elastic waves excited by an explosive and a shear dislocation source. We compare real data measurements with synthetics of the 2009 L'Aquila event (central Italy). We take advantage of the geometrical flexibility of the approach to generate a European model composed of the 3-D EPcrust model, combined with the depth-dependent ak135 velocity model in the upper mantle. The results confirm the applicability of the ADER-DG method for regional scale earthquake simulations, which provides an alternative to existing methodologies.

Summary
Regional wave propagation using the discontinuous Galerkin method

Excerpt
Alterman, Z., Jarosch, H., and Pekeris, C. L.: Oscillations of the Earth, Proc. R. Soc. Lond. A, 252, 80–95, http://rspa.royalsocietypublishing.org/content/252/1268/80.sh%ort, 1959.; Amante, C. and Eakins, B. W.: ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis, National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce, Boulder, CO, 2008.; Bao, H., Bielak, J., Ghattas, O., Kallivokas, L. F., O'Hallaron, D. R., Shewchuk, J. R., and Xu, J.: Large-scale simulation of elastic wave propagation in heterogeneous media on parallel computers, Comp. Methods Appl. Mech. Eng., 152, 85–102, doi:{10.1016/S0045-7825(97)00183-7}, 1998.; Bassin, C., Laske, G., and Masters, G.: The current limits of resolution for surface wave tomography in North America, EOS Trans. AGU, 81, F897, 2000.; Bayliss, A., Jordan, K. E., Lemesurier, B. J., and Turkel, E.: A fourth-order accurate finite-difference scheme for the computation of elastic waves, Bull. Seism. Soc. Am., 76, 1115–1132, http://www.bssaonline.org/cgi/content/abstract/76/4/1115, 1986.; Blacker, T. D., Bohnhoff, W. J., and Edwards, T. L.: CUBIT mesh generation environment. Volume 1: Users manual, Tech. rep., Sandia National Labs., Albuquerque, NM (United States), doi:{10.2172/10176386}, 1994.; Bohlen, T. and Saenger, E. H.: Accuracy of heterogeneous staggered-grid finite-difference modeling of Rayleigh waves, Geophysics, 71, 109–115, 2006.; Brocher, T. M.: Empirical Relations between Elastic Wavespeeds and Density in the Earth's Crust, Bull. Seism. Soc. Am., 95, 2081–2092, doi:{10.1785/0120050077}, http://www.bssaonline.org/cgi/content/abstract/95/6/2081, 2005.; Capdeville, Y., Vilotte, J.-P., and Montagner, J.-P.: Coupling the spectral element method with a modal solution for elastic wave propagation in global earth models, Geophys. J. Int., 152, 34–67, doi:{10.1046/j.1365-246X.2003.01808.x}, 2003.; Casarotti, E., Magnoni, F., Le Goff, N., Martin, R., Komatitsch, D., Plesch, A., Nissen-Meyer, T., Luo, Y., and Tromp, J.: Mesh Generation for Short-Period Seismic Wave Propagation Based Upon the Spectral- Element Method: Southern California., AGU Fall Meeting Abstracts, 89, S61B–1119, http://adsabs.harvard.edu/abs/2008AGUFM.S23A1875C, 2008{a}.; Casarotti, E., Stupazzini, M., Lee, S. J., Komatitsch, D., Piersanti, A., and Tromp, J.: CUBIT and seismic wave propagation based upon the Spectral-Element Method: An advanced unstructured mesher for complex 3D geological media, Vol. 5B.4, Chap. CUBIT and, 579–597, Springer, Berlin, 2008{b}.; Castro, C. E., Käser, M., Brietzke, G. B., C. E. Castro, and G. B. Brietzke: Seismic waves in heterogeneous material: subcell resolution of the discontinuous Galerkin method, Geophys. J. Int., 182, 250–264, doi:{10.1111/j.1365-246X.2010.04605.x}, 2010.; Chaljub, E.: Modélisation numériques de la propagation d'ondes sismiques à l'échelle du globe, Phd thesis, Université Paris 7, 2000.; Chiarabba, C., Amato, a., Anselmi, M., Baccheschi, P., Bianchi, I., Cattaneo, M., Cecere, G., Chiaraluce, L., Ciaccio, M. G., De Gori, P., De Luca, G., Di Bona, M., Di Stefano, R., Faenza, L., Govoni, a., Improta, L., Lucente, F. P., Marchetti, a., Margheriti, L., Mele, F., Michelini, a., Monachesi, G., Moretti, M., Pastori, M., Piana Agostinetti, N., Piccinini, D., Roselli, P., Seccia, D., and Valoroso, L.: The 2009 L'Aquila (central Italy) M W 6.3 earthquake: Main shock and aftershocks, Geophys. Res. Lett., 36, 1–6, doi:{10.1029/2009GL039627}, 2009.; Cupillard

 

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