2011 Events

April , June (select month of interest)

Eyjafjallajokull

View of Eyjafjallajokull summit (background) and Fimmvorduhals eruption sites (July 2010)


April

ABSTRACT DEADLINE: 11 January 2011

Vienna, AUSTRIA, 03-08 April

NH2.3/AS4.29/GMPV47 The 2010 flank and summit eruptions at Eyjafjallajökull volcano (Iceland): History of an eruption from source to the atmosphere (co-organized)

The 2010 flank and summit eruptions at Eyjafjallajökull volcano (Iceland) produced a wealth of data that are providing new avenues in volcanological research across several disciplines, such as in volcano seismology and deformation, geochemistry and petrology of mixed magmas, physical volcanology (i.e. conduit processes, volcano-ice interactions, eruption column dynamics and plume dispersal), volcano-environment interactions and hazard mitigation. The aim of this session is to bring together researchers that are working on different aspects of these eruptions and we welcome presentations on the following topics:

(a) Precursor activity including deformation and seismicity (b) Nature and depth of magma sources (c) Mechanisms and time-scales of magma mixing (d) Modes by which basaltic intrusions can trigger intermediate and silicic explosive eruption. (e) Origin and evolution of magmatic volatiles in systems of magma mixing, including records of degassing during rise of magma through the conduit. (f) Eruption mechanisms, including shallow-level conduit processes (i.e. magma degassing/fragmentation) and eruption column dynamics. (g) Volcano-ice interactions, jökulhlaups and lahars. (h) Tephra dispersal, including dispersal patterns, transport mechanisms and processes of deposition. (i) Weather related impact on plume height and ash dispersal. (j) Remote sensing of the volcanic plumes from the 2010 summit eruption (k) Environmental and socio-economic impacts (l) Response and hazard mitigation in relation to the effects of the 2010 summit eruption.

Solicited Speakers

Rikke Pedersen, Institute of Earth Sciences, University of Iceland (Precursor activity - Geodesy) Sigurlaug Hjaltadóttir, Icelandic Meteorological Office (Precursor activity - Seismicity) Olgeir Sigmarsson, Université Balise Pascal, Clermont Ferrand (Magma sources and evolution) Michael Burton, Istituto Nazionale di Geofisica e Vulcanologia (Volatile emissions) Armann Höskuldsson, Institute of Earth Sciences, University of Iceland (Tephra studies) Gudrun Nina Pedersen Icelandic Meteorological Office (near-source volcanic plumes) Sigurdur R. Gislason Institute of Earth Sciences, University of Iceland (Environmental effect).

Convener: Thorvaldur Thordarson; Co-Conveners: susan loughlin , Sigrún Hreinsdóttir , Halldór Björnsson , Séverine Moune

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June

ABSTRACT DEADLINE: EXTENDED to 1 FEBRUARY 2011 [click here for IUGG Abstract Submission]

Melbourne, AUSTRALIA, 28 June - 7 July

V16: Subglacial and Subaqueous and Volcanism: processes, products and impacts

Eruptions from subaqueous/subglacial vents are controlled by high confining pressure and interactions between magma and water/ice. Eruptions sourced in shallow water/thin ice can have sufficiently high eruption rates or eruption durations to breach the water/ice-air surface and become subaerial generating significant hazards and potential for highly explosive interaction between magma and water. The April 2010 eruption of Eyjafjallajokull not only affected the local population but became sufficiently violent to produce ash and steam-rich plumes rich in fluorine that caused,significant disruption to European airspace with a high cost local and global economies. For volatile-rich eruptions sourced in deep water and thick ice, high confining pressure reduces explosivity and the surrounding water affects eruption column dynamics. In contrast explosivity can be aided by magma/water interaction during effusive eruptions. The conditions extant during these eruptions form deposits that uniquely constrain evolving vent conditions over the course of eruptions, and can be important sources of paleo-climate information and water depth constraints. This session brings together researchers within the fields of submarine/sublaustine/subglacial effusive and explosive volcanism where confining pressure and ambient conditions influence the eruption processes. Particular emphasis will be on eruption dynamics, transport mechanisms, and hazards.

Lead Convenors: Sharon Allen (Australia), Ben Edwards (United States of America), Hugh Tuffen (United Kingdom), Magnus Gudmundsson (Iceland)

V07: Subaerial and Subaqueous Lava flows

Lava flows are formed by complex fluids that span the range of known magma compositions on Earth and other planetary bodies. Lava flow studies are multifaceted and involve a wide range of approaches, including field based observations and measurements, laboratory simulations, numerical modelling and remote sensing. Studies on effusive eruptions at active volcanoes, in particular those with high recurrence intervals of such events, have played a key role in linking flow field architecture, flow structures and magma rheology to the emplacement modes and mechanisms characteristic of individual lava types. These studies have also facilitated assessments of the hazard and risk posed by lava flows to populated areas and demonstrated the need for near-real time forecasting of lava flow length and path in order to protect the public. Research over the last two decades has highlighted several critical elements that exert important controls on flow behaviour. These include degassing-induced changes in magma/lava rheology, rate of heat loss during lava emplacement, modes of emplacement (i.e. endogenous versus exogenous growth - inflation), open versus closed system transport (channels vs tubes), and motion patterns at the active flow fronts, to name but a few. There is little doubt that effective integration of the multifaceted approaches used in lava flow studies will continue to enhance our understanding of lava flow dynamics and emplacement styles of ancient, as well as extraterrestrial, lava flow fields. By the same token, improvement of existing approaches as well as introduction of, and integration with, new research tools will enhance our research capabilities. We invite contributions that deal with these and other aspects of subaerial, submarine and planetary lava flows and particularly encourage contribution of results that consider multidisciplinary approaches.

Lead Convenors: Thor Thordarsson (United Kingdom), Andy Harris (France), Sonia Calvari (Italy)

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