Directors

Yoshihiro Ishizuka (Director)
Kazutoshi Imanishi (Deputy Director)

My research interests focus on investigating stress state at depth based on microearthquake observation and data analysis. So far, I have primarily investigated the stress accumulation process of inland earthquakes, the generation mechanism of non-volcanic deep tremor, and developed a method for estimating absolute crustal stress. Together with developing these studies, I aim to elucidate the generation mechanism of earthquakes step by step through discussions with group member and the people who possess various skill and background.

https://researchmap.jp/imani

Yukari Miyashita (Deputy Director)
Masanobu shishikura (Associate Manager)
Osamu Ishizuka (Prime Senior Researcher)
Makoto Otsubo (concurrent) (secondment)

I research underground geological characteristics, dynamic geological processes, and the long-term stability of geological environments to understand possibilities of the fault movements, volcanic activity and uplift/erosion. I study constructing long-term dynamic geological modeling for connections between fault and volcanic activities by using the Tectonophysics approaches.

HP: https://staff.aist.go.jp/otsubo-m/index.html

Yusuke Minami (Researcher)

Expertise: Volcano Geology

Yukinobu Okamura (Invited Senior Researcher)
Hiroshi Shinohara (Invited Senior Researcher)

My main interest is to understand eruption and degassing processes based on surveillance of volcanic gases and volatiles in magmas. I recently developed Multi-GAS (a portable instrument to measure volcanic gas composition) and applied to active degassing plumes of various volcanoes in many countries as well as to conduct continuous monitoring. We evaluate the volcanic activity and model eruption and degassing processes based on the spatial and temporal variation of the volcanic gases. We also investigate volcanic activity with hydrothermal system based on the surveillance of fumarolic gases.

HP: Magmatic Activity Research Group

Akikazu Matsumoto (Invited Senior Researcher)
Takahiro Yamamoto (Invited Senior Researcher)

I focus on research in reconstruction of paleoearthquake events of major active faults in Japan to evaluate earthquake potential caused by the faults. I also try to develop a new fault activity evaluation method using mineral, chemical and textural features of fault gouges. My final research target is to understand evolution process of active faults through overlap relation analyses of geological structures and fault rocks from middle crust (seismogenic zone) to land surface.