3D tomography of volcanoes and faults using cosmic ray radiography and gravity measurement

2016 Fiscal Year Final Research Report

• Project/Area Number: 23244092
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: Okubo Shuhei 東京大学, 地震研究所, 教授 (30152078)
• Co-Investigator(Kenkyū-buntansha): 田中 宏幸 東京大学, 地震研究所, 教授 (20503858) ; 今西 祐一 東京大学, 地震研究所, 准教授 (30260516) ; 田中 愛幸 東京大学, 地震研究所, 助教 (90508350) ; 武多 昭道 東京大学, 地震研究所, 助教 (30589271) ; 寺家 孝明 国立天文台, 水沢VLBI観測所, 助教 (40425400)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 観測手法 / 宇宙線透視 / 重力 / 火山 / 断層

Outline of Final Research Achievements

We develop an ultra low noise muography system composed of multilayer muon sensors and plumb layers. The resultant muography data are combined with surface gravity anomaly to estimate internal 3D density structure with high spatial resolution. We carried out continuous gravity observation at Sakurajima volcano whose geometry of a conduit is well known. We clearly observed excellent correlation between gravity and explosion activity there.

Free Research Field

測地学