Fourth‐Order Staggered‐Grid Finite‐Difference Seismic Wavefield Estimation Using a Discontinuous Mesh Interface (WEDMI)

• DOI: 10.1785/0120170077
• Publication Date: 2017-12-13T22:56:26Z
• Authors: Shiying Nie; Yongfei Wang; Kim B. Olsen; Steven M. Day
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

Research Article| September 25, 2017 Fourth‐Order Staggered‐Grid Finite‐Difference Seismic Wavefield Estimation Using a Discontinuous Mesh Interface (WEDMI) Shiying Nie; Nie aDepartment of Geological Sciences, San Diego State University, 5500 Campanile Drive, Diego, California 92182, [e-mail], [e-mail], [e-mail], [e-mail] Search for other works by this author on: GSW Google Scholar Yongfei Wang; Wang [e-mail] at Institute Geophysics and Planetary Physics, Scripps Institution Oceanography, University California, 9500 Gilman La Jolla, 92093‐0225. Kim B. Olsen; Olsen Steven M. Day Author Article Information Publisher: Seismological Society America First Online: 27 Sep Online Issn: 1943-3573 Print 0037-1106 Bulletin the (2017) 107 (5): 2183–2193. https://doi.org/10.1785/0120170077 history Cite View This Citation Add to Manager Share Icon Facebook Twitter LinkedIn MailTo Tools Get Permissions Site Nie, Wang, Olsen, Day; (WEDMI). 2017;; doi: Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Dropdown Menu input auto suggest filter your All ContentBy SocietyBulletin Advanced Abstract In realistic geological structure with large contrast in seismic wavespeed between shallow deep regions, simulation wave propagation using spatially uniform grid can be computationally very demanding, due overdiscretization high‐speed material. Thus, numerical methods that allow coarser discretization faster regions have potential much more efficient. mesh (DM) methods, operating exchanging wavefield information media partitions discretized two different spacings, provide convenient way improve such efficiency issues. Unfortunately, discontinuous staggered‐grid finite‐difference (FD) typically suffer from inherent stability problems, particular strongly heterogeneous media, arising noise generated overlap spacing. We developed 3D fourth‐order velocity‐stress FD DM anelastic method (AWP‐DM) estimation interface fine coarse meshes. Benchmarks models velocity variations finite‐fault sources across show stable results number timesteps, exceeding need dictated current high‐frequency ground‐motion simulations. case factor‐of‐three ratio sizes, is capable producing level accuracy comparable fine‐grid scheme, least 7–8 points per minimum S wavelength inside zone. You do not access content, please speak institutional administrator if you feel should access.