Zobrazeno 1 - 10
of 46
pro vyhledávání: '"MUGA YAGUCHI"'
Autor:
Tomoya Obase, Hirochika Sumino, Kotaro Toyama, Kaori Kawana, Kohei Yamane, Muga Yaguchi, Akihiko Terada, Takeshi Ohba
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-12 (2022)
Abstract We repeatedly measured isotopic compositions of noble gases and CO2 in volcanic gases sampled at six fumaroles around the Kusatsu-Shirane volcano (Japan) between 2014 and 2021 to detect variations reflecting recent volcanic activity. The syn
Externí odkaz:
https://doaj.org/article/e7ce28e339364b56a02028c0e4a9a5d1
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-17 (2021)
Abstract Direct sampling and analysis of fumarolic gas was conducted at Ebinokogen Ioyama volcano, Japan, between December 2015 and July 2020. Notable changes in the chemical composition of gases related to volcanic activity included a sharp increase
Externí odkaz:
https://doaj.org/article/a64f104f948f447289097ab824aacd71
Publikováno v:
Frontiers in Earth Science, Vol 9 (2022)
Regular sampling of lake water has been performed at many volcanoes to assess the state of volcanic activity. However, it is not clear whether the absolute concentrations or, instead, rate of changes in concentrations are more suitable for such asses
Externí odkaz:
https://doaj.org/article/a7977c82562546c8afc97336528ffce1
Publikováno v:
Frontiers in Earth Science, Vol 9 (2021)
Interpreting the triggering mechanisms for phreatic eruptions is a key to improving the hazard assessment of crater lakes. Yugama Crater Lake at Kusatsu-Shirane volcano, Japan, is the site of frequent phreatic eruptions with the recent eruptions in 1
Externí odkaz:
https://doaj.org/article/3cd10337bcc646378f4d2e70eaf28d23
Autor:
Takeshi Ohba, Muga Yaguchi, Kana Nishino, Nozomi Numanami, Yasushi Daita, Chiho Sukigara, Masanori Ito, Urumu Tsunogai
Publikováno v:
Earth, Planets and Space, Vol 71, Iss 1, Pp 1-18 (2019)
Abstract Definite increases in the components ratios of CO2/H2O, CO2/H2S, CO2/CH4 and He/CH4 were observed at the fumarolic gases from Owakudani geothermal area located at the center of Hakone volcanic caldera (Honshu Island, Japan), synchronized wit
Externí odkaz:
https://doaj.org/article/55c26b12e0c54f0ebe94d090cface691
Autor:
Akihiko Terada, Yuichi Morita, Takeshi Hashimoto, Toshiya Mori, Takeshi Ohba, Muga Yaguchi, Wataru Kanda
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-9 (2018)
Abstract Remote sampling of water from Yugama crater lake at Kusatsu-Shirane volcano, Japan, was performed using a drone. Despite the high altitude of over 2000 m above sea level, our simple method was successful in retrieving a 250 mL sample of lake
Externí odkaz:
https://doaj.org/article/bc1e711484b548b39fcaedebbc853b5f
Autor:
Muga YAGUCHI1 myaguchi@mri-jma.go.jp
Publikováno v:
Journal of Hot Spring Sciences / Onsen Kagaku. Sep2020, Vol. 70 Issue 2, p70-79. 10p.
Autor:
Takeshi Ohba, Muga Yaguchi, Kana Nishino, Nozomi Numanami, Urumu Tsunogai, Masanori Ito, Ryo Shingubara
Publikováno v:
Frontiers in Earth Science, Vol 7 (2019)
Minor seismicity may occur at volcanoes with hydrothermal system before a steam eruption. To forecast any steam eruption, it is indispensable to detect and understand the nature of this shallow seismicity. As the fumarolic gas resides in the hydrothe
Externí odkaz:
https://doaj.org/article/f1725c48dc2c4f15983d127a3c76f8e9
Publikováno v:
Journal of Geography (Chigaku Zasshi). 130:783-796
Autor:
YOICHI MURAMATSU1 muramatu@rs.noda.tus.ac.jp, MUGA YAGUCHI2
Publikováno v:
Journal of Hot Spring Sciences / Onsen Kagaku. Dec2020, Vol. 70 Issue 3, p124-136. 13p.