[S-VC42] Dynamics of volcanic eruptions and their physical and chemical processes

convener:Atsuko Namiki(Graduate School of Integrated Arts and Sciences, Hiroshima University), Christian Huber(Brown University), Michael Manga(University of California Berkeley), Yujiro Suzuki(Earthquake Research Institute, The University of Tokyo)

A Volcanic eruption is a hazardous phenomenon that results from a sequence of coupled processes, including storage in the subsurface and ascent to the surface. The volcanic gas exsolving from the ascending magma generates bubbles, which influence both the potential energy of the magma (density) and its resistance to flow (viscosity). Bubbles can sometimes deform and/or fragment the surrounding magma, leading up to explosive eruptions that develop volcanic plumes and/or pyroclastic flows. A broad range of approaches is required to tackle these processes and better understand the factors that govern the physics of explosive eruptions. We welcome contributions from interdisciplinary approaches, including, geophysical observations of active/quiet volcanoes, geochemical measurements of eruptive products, theoretical approaches, and numerical simulations, and laboratory experiments designed to explore the fundamental processes underlying explosive volcanism.

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[SVC42-01] Magma flow style based on deformed bubble structure of pumice

*Masatoshi Ohashi¹, Mie Ichihara² (1.Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University, 2.Earthquake Research Institute, the University of Tokyo)

Cancelled

[SVC42-02] Magma ascent and bubble nucleation in the rhyolite-magnetite-H₂O system: Observation and characterization of a second nucleation event at low pressure by X-ray microtomography

*Didier Laporte¹, Nicolas Cluzel¹, Lucia Pappalardo², Gianmarco Buono², Ariel Provost¹ (1.Laboratoire Magmas et Volcans, Université Clermont Auvergne/CNRS/IRD, Clermont-Ferrand, France, 2.Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano - sezione di Napoli, Italy)

[SVC42-03] The dynamics of buoyancy driven fragmentation in a deep subaqueous volcanic eruption, observations of the 2009 eruption of West Mata

*Arran Peter Murch¹, Ryan A. Portner², Kenneth H. Rubin³, David A. Clague⁴ (1.Department of Geology and Paleontology, National Museum of Nature and Science, Tsukuba, Japan , 2.Geology Department, San Jose State University, USA, 3.SOEST, University of Hawaii at Manoa, USA, 4.Monterey Bay Aquarium Research, Moss Landing, USA)

[SVC42-04] Eruption mechanics of the 2012 eruption of Mount Tongariro, NZ: Revealed by temporal Magnetotellurics

*Graham Hill^1,2, Hugh Bibby³, Jared Peacock⁴, Erin Wallin⁵, Yasuo Ogawa⁶, Luca Caricchi⁷, Harry Keys⁸, Stewart Bennie³, Yann Avram⁹ (1.Institute of Geophysics, Czech Academy of Science, Prague, Czech Republic, 2.Gateway Antarctica, University of Canterbury, Christchurch, New Zealand, 3.GNS Science, Lower Hutt, New Zealand, 4.United States Geological Survey, Menlo Park CA, USA, 5.United States Army Corps of Engineers, Huntsville AL, USA, 6.Volcanic Fluid Research Centre, Tokyo Institute of Technology, Tokyo, Japan, 7.Department of Earth Sciences, University of Geneva, Geneva, Switzerland, 8.Department of Conservation, Turangi, New Zealand, 9.Phoenix Geophysics, Toronto, Canada)

[SVC42-05] Fluid ascent dynamics of the Onikobe geyser, NE Japan: Insight from the thermal infrared imagery

*Noriko Teshima¹, Takeshi Nishimura¹, Hiroshi Aoyama², Ayuta Tsuge² (1.Department of Geophysics, Graduate School of Science, Tohoku University, 2.Institute of Seismology and Volcanology, Faculty of Science, Hokkaido University)

Cancelled

[SVC42-06] Numerical Modeling of Volcano Hydrothermal Systems: the case of La Soufrière de Guadeloupe Volcano (West Indies, France)

★Invited Papers

*Marina Rosas-Carbajal¹ (1.Institut de Physique du Globe de Paris)