Analysis of the epicentral area and the active fold in the 2004 Niigata Chuetsu earthquake based on the quantification of the amount of inclination change

2012 Fiscal Year Final Research Report

• Project/Area Number: 23701029
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geography
• Research Institution: The University of Tokyo
• Principal Investigator: KIM Haengyoong 東京大学, 地震研究所, 外来研究員 (60378552)
• Project Period (FY): 2011 – 2012
• Keywords: 活断層 / 活褶曲 / 中越地震 / 傾斜変動量 / 地震性変動 / 非地震性変動 / 変動地形

Research Abstract

The 2004 Niigata Chuetsu earthquake (Mw6.6) occurred with the inland active fold and reversed fault belt. This research tried quantification of the amount of inclination, in order to understand the style of the crustal movement. The geological data of about 2000 points, the geological unit, strike and the inclination, were inputted into GIS, and the frequency of the distribution over the geological unit was created. In addition, we interpreted the fluvial terrace surface and the alluvial surface from the air photographs, the classification map is created. These geologic data and geographical feature data piled-up on GIS serve as a displacement standard of an activity of the active fault or a long term of the crustal movement.