Satoshi Okumura

J-GLOBAL         Last updated: Oct 22, 2018 at 20:47
Satoshi Okumura
Tohoku University

Research Interests


Research Areas


Published Papers

Minami Kuroda, Shogo Tachibana, Shogo Tachibana, Naoya Sakamoto, Satoshi Okumura, Michihiko Nakamura, Hisayoshi Yurimoto, Hisayoshi Yurimoto, Hisayoshi Yurimoto
American Mineralogist   103 412-417   Mar 2018
© 2018 Walter de Gruyter GmbH, Berlin/Boston. Water diffusion in silicate melts is a fundamental process controlling physical and chemical consequences for magmatism, but mechanisms of diffusion in silicate glasses and melts are not fully understo...
M. Kameda, M. Ichihara, S. Maruyama, N. Kurokawa, Y. Aoki, S. Okumura, K. Uesugi
Scientific Reports   7    Dec 2017
© 2017 The Author(s). Decompression times reported in previous studies suggest that thoroughly brittle fragmentation is unlikely in actual explosive volcanic eruptions. What occurs in practice is brittle-like fragmentation, which is defined as the...
Aika K. Kurokawa, Takahiro Miwa, Satoshi Okumura, Kentaro Uesugi
Journal of Volcanology and Geothermal Research   343 211-219   Sep 2017
© 2017 Elsevier B.V. After ash-dominated Strombolian eruption, considerable amount of ash falls back to the volcanic conduit. By the fallback ash, the formation of a dense near-surface region is expected because it is compacted by weights of its o...
S. Okumura, T. Kozono
Geophysical Research Letters   44 3608-3614   Apr 2017
©2017. American Geophysical Union. All Rights Reserved. Silicic magma forms a vertical fault in volcanic conduits via the brittle-ductile transition. The formation of the fault changes flow type from viscous flow to friction controlled flow. Here ...
Taku Suzuki, Masaoki Uno, Satoshi Okumura, Ryoichi Yamada, Noriyoshi Tsuchiya
Journal of the Geothermal Research Society of Japan   39 25-37   Jan 2017
© The Geothermal Research Society of Japan, 2017. In order to evaluate the present geothermal resources in fossil volcanic caldera systems, petrological structures under calderas were investigated and compared with geophysical structures for Shira...

Conference Activities & Talks

Laboratory Simulation of Shear Deformation and Outgassing of Silicic Magmas [Invited]
Satoshi Okumura
Goldschmidt Conference 2016   Jun 2016   
Outgassing of silicic magma through bubble and fracture networks [Invited]
Satoshi Okumura
American Geophysical Union Fall Meeting   Dec 2013   
Coupled effect of magma degassing and rheology on silicic volcanism [Invited]
Satoshi Okumura
European Geosciences Union General Assembly   Apr 2012