Imaging conduit of active volcanoes using reciprocity theorem

Research Project

Project/Area Number	25800244
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Solid earth and planetary physics
Research Institution	The University of Tokyo
Principal Investigator	Aoki Yosuke 東京大学, 地震研究所, 助教 (90376624)
Project Period (FY)	2013-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000) Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords	地震波干渉法 / 地震波速度変化 / 非線形弾性 / 地震波速度の時間変化 / 地下構造 / 活火山 / 火山性地震
Outline of Final Research Achievements	Recent emergence of seismic interferometry using random signals allows us to delineate temporal changes of seismic velocities associated with earthquakes and volcanic activity. During this project, we delineated shallow seismic velocity changes associated with the 2011 Tohoku-oki earthquake to find that seismic velocity changes do not correlated with neither static nor dynamic stress changes. Instead, velocity changes tend to be larger around active volcanoes. We also discussed briefly the origin of seismic velocity changes from theoretical point of view.

Report

(4 results)