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5. Volcanology

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  1. On 27 September 2014, Ontake volcano, in central Japan, suddenly erupted without precursory activity. We estimated and tracked the source locations of volcanic tremor associated with the eruption at high tempo...

    Authors: Masashi Ogiso, Hirotoshi Matsubayashi and Tetsuya Yamamoto
    Citation: Earth, Planets and Space 2015 67:206
  2. The phreatic eruption of Mt. Ontake in 2014 was preceded for 25 s by a very long period (VLP) seismic event recorded at one broadband and three short-period seismic stations located within 5000 m of the summit...

    Authors: Yuta Maeda, Aitaro Kato, Toshiko Terakawa, Yoshiko Yamanaka, Shinichiro Horikawa, Kenjiro Matsuhiro and Takashi Okuda
    Citation: Earth, Planets and Space 2015 67:187
  3. We studied the origin of deep groundwater in the Joban and Hamadori areas in southern Tohoku, Japan, based on δD, δ18O, 129I/I, 36Cl/Cl, and 3H concentrations. Deep groundwater was collected from the basement roc...

    Authors: Yoko S Togo, Kohei Kazahaya, Yuki Tosaki, Noritoshi Morikawa, Hiroyuki Matsuzaki, Masaaki Takahashi and Tsutomu Sato
    Citation: Earth, Planets and Space 2014 66:131
  4. Multiple observations of subsurface and surface phenomena during volcanic eruptions provide important information about eruption styles, eruption column dynamics, and magma plumbing systems. During the 2011 er...

    Authors: Tomofumi Kozono, Hideki Ueda, Toshiki Shimbori and Keiichi Fukui
    Citation: Earth, Planets and Space 2014 66:139
  5. The variation in water content of arc basaltic magmas in the Northeast Japan arc and the Izu arc was estimated using a simple plagioclase phenocryst hygrometer. In order to construct a plagioclase phenocryst h...

    Authors: Masashi Ushioda, Eiichi Takahashi, Morihisa Hamada and Toshihiro Suzuki
    Citation: Earth, Planets and Space 2014 66:127
  6. Non-volcanic hot springs are generally believed to originate through circulation of meteoric or buried sea water heated at depth. In this study, we report the geochemical characteristics of the Arima and Takar...

    Authors: Chiho Kusuda, Hikaru Iwamori, Hitomi Nakamura, Kohei Kazahaya and Noritoshi Morikawa
    Citation: Earth, Planets and Space 2014 66:119
  7. The composition of continental subduction-zone fluids varies dramatically from dilute aqueous solutions at subsolidus conditions to hydrous silicate melts at supersolidus conditions, with variable concentratio...

    Authors: Yong-Fei Zheng and Joerg Hermann
    Citation: Earth, Planets and Space 2014 66:93
  8. Geochemical signatures of arc basalts can be explained by addition of aqueous fluids, melts, and/or supercritical fluids from the subducting slab to the sub-arc mantle. Partitioning of large-ion lithophile ele...

    Authors: Tatsuhiko Kawamoto, Kenji Mibe, Hélène Bureau, Solenn Reguer, Cristian Mocuta, Stefan Kubsky, Dominique Thiaudière, Shigeaki Ono and Tetsu Kogiso
    Citation: Earth, Planets and Space 2014 66:61
  9. Titanian clinohumite is an accessory phase found in peridotites, and it can be a key repository of volatile and other trace elements in sub-arc mantle. To characterize spectroscopic variations due to volatile ...

    Authors: Kenneth T Koga, Carlos J Garrido, José A Padrón-Navarta, Vicente López Sánchez-Vizcaíno and María T Gómez-Pugnaire
    Citation: Earth, Planets and Space 2014 66:60
  10. First testing of volcanic activity monitoring with a system of continuously operatable seismic sources, named ACROSS, was started at Sakurajima Volcano, Japan. Two vibrators were deployed on the northwestern f...

    Authors: Koshun Yamaoka, Hiroki Miyamachi, Toshiki Watanabe, Takahiro Kunitomo, Tsuyoshi Michishita, Ryoya Ikuta and Masato Iguchi
    Citation: Earth, Planets and Space 2014 66:32
  11. We performed melting experiments of hydrous pyrolite at pressures from 3 to 8 GPa and temperatures from 1,100°C to 1,800°C to identify the origin of chemical variation in cratonic garnet peridotites with high ...

    Authors: Kyoko N Matsukage and Toshisuke Kawasaki
    Citation: Earth, Planets and Space 2014 66:29
  12. Island arc low-K tholeiites are basaltic magmas erupting from frontal arc volcanoes of juvenile arcs associated with the subduction of old and cold plates. We investigated the origins of geochemical variation ...

    Authors: Morihisa Hamada, Yuko Okayama, Takayuki Kaneko, Atsushi Yasuda and Toshitsugu Fujii
    Citation: Earth, Planets and Space 2014 66:15
  13. We applied the Markov random field model, which is a kind of a Bayesian probabilistic method, to the spatial inversion of the porosity and pore shape in rocks from an observed seismic structure. Gaussian Marko...

    Authors: Tatsu Kuwatani, Kenji Nagata, Masato Okada and Mitsuhiro Toriumi
    Citation: Earth, Planets and Space 2014 66:5
  14. The electrical conductivity of brine-bearing quartzite with fluid fractions of 0.19 to 0.30 and salinity of 3 to 17 wt.% was measured at 800 to 1,100 K and 1 GPa. The conductivity of the brine-bearing quartzit...

    Authors: Akira Shimojuku, Takashi Yoshino and Daisuke Yamazaki
    Citation: Earth, Planets and Space 2014 66:2

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