V31F:
Eruptive Processes and Watery Hazards of "Wet" Volcanoes on Land, in the Sea, or under Ice I


Session ID#: 9815

Session Description:
Water in oceans, glaciers, lakes, streams and aquifers lies in the path of magma ascending to eruption over the great majority of Earth, and on some other planets as well. In addition to pressure effects of eruptions under water or ice, water thermally affects magma during effusion or fragmentation and strongly modifies particle transport.  This can produce phenomena that include edifice collapse resulting from persistent hydrothermal alteration, sudden discharges of water from hydrothermal systems, precipitation-related collapses, hydrothermal eruptions without clear precursors, and debris flows and lahars triggered by crater-lake outbreaks.  We invite contributions on all aspects of water-magma interaction and hazards resulting from them, including contributions on submarine volcanism, volcanism in lakes, phreatomagmatic eruptions, subglacial volcanism, subsurface interactions of dikes and conduits with country-rock groundwater, the behavior/evolution of hydrothermal systems, hydrothermal explosions, and water’s role in volcano structural instabilities and the formation and emplacement of avalanches and lahars.
Primary Convener:  James D L White, University of Otago, Geology Department, Dunedin, New Zealand
Conveners:  Jessica L Ball, USGS Western Regional Offices Menlo Park, Menlo Park, CA, United States, Alexa R Van Eaton, USGS Cascades Volcano Observatory, Vancouver, WA, United States and Corentin Caudron, Université Libre de Bruxelles, Brussels, Belgium
Chairs:  Jessica L Ball, USGS Western Regional Offices Menlo Park, Menlo Park, CA, United States and Corentin Caudron, Université Libre de Bruxelles, Brussels, Belgium
OSPA Liaison:  Jessica L Ball, USGS Western Regional Offices Menlo Park, Menlo Park, CA, United States

Cross-Listed:
  • H - Hydrology
  • NH - Natural Hazards
Index Terms:

1810 Debris flow and landslides [HYDROLOGY]
8427 Subaqueous volcanism [VOLCANOLOGY]
8428 Explosive volcanism [VOLCANOLOGY]
8488 Volcanic hazards and risks [VOLCANOLOGY]

Abstracts Submitted to this Session:

Alteration of Basalt and Hyaloclastite in the Project Hotspot MHC-2 Core with Some Comparison to Hyaloclastites of the Hawaii Scientific Drilling Program #2 (HSDP) Core (68356)
Anthony W Walton, University of Kansas, Lawrence, KS, United States and Jeffrey R Walker, Vassar College, Earth Science and Geography, Poughkeepsie, NY, United States
Identifying Water on Mt. Baker and Mt. St. Helens, WA with Geophysics: Implications for Volcanic Landslide Hazards (Invited) (63495)
Carol Finn1, Paul Bedrosian2, Matthew Wisniewski3 and Maria Deszcz-Pan2, (1)USGS, Geology, Geophysics, and Geochemistry Science Center, Denver, United States, (2)USGS, Denver, CO, United States, (3)USGS, Denver, United States
Pore Pressure Distribution and Flank Instability in Hydrothermally Altered Stratovolcanoes (66553)
Jessica L Ball, USGS Western Regional Offices Menlo Park, Menlo Park, CA, United States, Joshua Taron, California Geological Survey Menlo Park, Menlo Park, CA, United States, Shaul Hurwitz, USGS California Water Science Center Menlo Park, Menlo Park, CA, United States and Mark E Reid, USGS Western Regional Offices Menlo Park, Menlo Park, United States
Pyroclastic density current dynamics and associated hazards at ice-covered volcanoes (85485)
James Cowlyn1, Josef Dufek2, Ben Kennedy1 and Julian McAdams3, (1)University of Canterbury, Christchurch, New Zealand, (2)University of Oregon, Department of Earth Sciences, Eugene, United States, (3)Georgia Institute of Technology Main Campus, Atlanta, GA, United States
Modelling of Subglacial Volcanic and Geothermal Activity, during the 2014-15 Bárdarbunga-Holuhraun Eruption and Caldera Collapse (Invited) (78160)
Hannah Iona Reynolds1, Magnus Tumi Gudmundsson2 and Thordis Hognadottir1, (1)University of Iceland, Institute of Earth Sciences, Reykjavik, Iceland, (2)University of Iceland, Nordic Volcanological Center, Institute of Earth Sciences, Reykjavik, Iceland
Products of a Subglacial Flood Basalt Eruption (64803)
Carolyn F Gorny, University of Otago, Dunedin, New Zealand, James D L White, University of Otago, Geology Department, Dunedin, New Zealand and Magnus Tumi Gudmundsson, University of Iceland, Nordic Volcanological Center, Institute of Earth Sciences, Reykjavik, Iceland

See more of: Volcanology, Geochemistry and Petrology