Detailed examination of the Arc-arc collision process and its relationship with deformation mechanism of the Pacific slab, beneath the Hokkaido

2015 Fiscal Year Final Research Report

• Project/Area Number: 25800243
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Solid earth and planetary physics
• Research Institution: Hiroshima University (2015); National Research Institute for Earth Science and Disaster Prevention (2013-2014)
• Principal Investigator: Kita Saeko 広島大学, 理学(系)研究科(研究院), 特任助教 (10543449)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 地震波減衰構造 / スラブ内地震 / 日高衝突帯 / 北海道 / メカニズム解 / 地震波トモグラフィー法

Outline of Final Research Achievements

I successfully estimated a detailed seismic attenuation structure beneath Hokkaido. The characteristics of the obtained attenuation structure is almost the same trend in the seismic velocities structure by Kita et al. [2012, JGR]. I also estimated stress drops of intraslab earthquakes beneath Hokkaido, which promotes the understanding the cause of the intraslab earthquakes. I can also estimated a seismic attenuation structure beneath southwestern Japan, using my study experience beneath Hokkaido. Finally, three papers are published using this science fund.

Free Research Field

地震学