Modeling of 3D Basin Structures for Seismic Wave Simulations Based on Available Information on the Target Area: Case Study of the Osaka Basin, Japan

Research Article| August 01, 2004 Modeling of 3D Basin Structures for Seismic Wave Simulations Based on Available Information on the Target Area: Case Study of the Osaka Basin, Japan Takao Kagawa; Takao Kagawa Search for other works by this author on: GSW Google Scholar Boming Zhao; Boming Zhao Search for other works by this author on: GSW Google Scholar Ken Miyakoshi; Ken Miyakoshi Search for other works by this author on: GSW Google Scholar Kojiro Irikura Kojiro Irikura Search for other works by this author on: GSW Google Scholar Author and Article Information Takao Kagawa Boming Zhao Ken Miyakoshi Kojiro Irikura Publisher: Seismological Society of America First Online: 03 Mar 2017 Online ISSN: 1943-3573 Print ISSN: 0037-1106 Copyright © 2004 by the Seismological Society of America Bulletin of the Seismological Society of America (2004) 94 (4): 1353–1368. https://doi.org/10.1785/012003165 Article history First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Takao Kagawa, Boming Zhao, Ken Miyakoshi, Kojiro Irikura; Modeling of 3D Basin Structures for Seismic Wave Simulations Based on Available Information on the Target Area: Case Study of the Osaka Basin, Japan. Bulletin of the Seismological Society of America 2004;; 94 (4): 1353–1368. doi: https://doi.org/10.1785/012003165 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Practical procedures for modeling basin structure are proposed. One is to construct a smooth 3D basin structure model under and around the target site for low-frequency strong motion simulation. The other is to make a 1D velocity structure model just under the target site for high frequencies. These procedures were applied to the Osaka basin, Japan, in which numerous exploration studies were conducted before and after the 1995 Hyogoken-Nanbu (Kobe) Earthquake. The published results of those explorations in addition to those from our several investigations were compiled to construct the model.A two-dimensional third-order B-spline function was used to establish a smooth structure model from available depth data. Microtremor array observations were used to model the velocities and densities of the sedimentary layer structures. A four-layer model well explains the dispersion characteristics of Rayleigh waves that make up the microtremors. By adding a detailed shallow velocity structure to the top of the deeper four-layer model, adequate site responses for a wide frequency range of ground motions can be obtained. This proposed procedure can be used to determine the basement geometry of other sedimentary basins. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.