[S-SS11] 活断層と古地震

[SSS11-P11] Trial of the Japanese Community Fault Model

*安藤 亮輔¹、吾妻 崇³、青山 都和子⁵、前原 誠也¹、綿貫 元起³、Seebeck Hannu²、Howell Andy^4,2、McLennan Tim⁶、CFM working group (1.東京大学大学院理学系研究科、2.GNS Science、3.産業技術総合研究所、4.カンタベリー大、5.東京大学地震研究所、6.Seequent)

キーワード：断層形状、活断層

3D fault geometry models are developed and opened in several regions, including Southern California and New Zealand (NZ), based on the community effort and consensus called the Community Fault Model (CFM). CFMs are supposed to be used for strong motion calculation and south physics modeling and are evaluated openly by the scientific community and updated based on the latest observational constraints. We developed a trial version of CFM for 50 faults of the major active faults in Japan. We follow the procedure of the NZ-CFM to develop the fault model (Seebeck, 2022). Firstly, we simplify the fault traces in the existing catalog compiled by the Geological Survey of Japan. Next, we build the 3D geometry of fault surfaces by extending the surface traces with constant dip angles. We used GIS software such as QGIS and ArcGIS to simplify the surface traces and CAD software called Leapfrog to systematically treat the build of the 3D geometry. The developed geometry model will be evaluated by the community this year, and we will continue to develop the model for all major fault systems in Japan of one hundred.