Newly designed digital active fault map using high-resolution DEM-based geomorphological data

2021 Fiscal Year Final Research Report

• Project/Area Number: 16H01829
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geography
• Research Institution: Chiba University
• Principal Investigator: MIYAUCHI TAKAHIRO 千葉大学, 大学院理学研究院, 教授 (00212241)
• Co-Investigator(Kenkyū-buntansha): 後藤 秀昭 広島大学, 人間社会科学研究科(文), 准教授 (40323183)
• Project Period (FY): 2016-04-01 – 2021-03-31
• Keywords: 高解像度DEMデータ / アナグリフ判読 / オンラインマッピング / 震源断層モデル / セグメンテーション / query方式検索エンジン

Outline of Final Research Achievements

We successfully detected and precisely mapped previously unknown active faults in the Japanese Islands, utilizing high-resolution DEM-based topographic data. Synthesizing tectonic geomorphology, earthquake geology and exploration seismology, we could recognize the minimum and maximum of behavioral segments of fault zones which are responsible for large inland M7-class earthquakes. A newly designed digital active fault map incorporating the 3D source fault models were built as a database. In addition, the search and sort engine with interactive query function was constructed, which can be combined with the database. These results lead us to release soon the synthetically cloud-computed digital active fault map related to source faults, improving user interfaces.

Free Research Field

地形学

Academic Significance and Societal Importance of the Research Achievements

本研究でまとめらた日本列島の活断層・震源断層の電子活断層図は，地震調査委員会（文部科学省）や地方自治体から発表されている直下型地震の強震度予測地図の改訂に対して極めて有効な第一次情報であり，地震災害軽減のために大きく貢献する点で意義が大きい。本研究によって均質な基準で国土全体の地震発生ポテンシャルを把握することができる観点からも，日本列島の活断層・震源断層情報を新技術で更新し，発信することは極めて重要な研究と位置づけられる。