************************************************************************************************************
==============================================================
From: Tomaso Esposti Ongaro <tomaso.espostiongaro@xxxxxxx>
Subject: COV10: Call for abstracts, S1.27 “Phreatic and hydrothermal eruptions: processes, deposits, and hazards”
************************************************************************************************************
Dear colleague,
If you are interested in presenting your work on steam-driven, phreatic / hydrothermal eruptions and related hazards at the next Cities on Volcanoes 10 (to be held in Naples, Italy, September 2-7, 2018), please consider submitting your abstract to the Session :
S1.27 “Phreatic and hydrothermal eruptions: processes, deposits, and hazards”
This session has the sponsorship and support of the IAVCEI Commission on Explosive Volcanism.
Contributions to the Session are foreseen on some recent phreatic events (La Soufrière, Te Maari - Tongariro, Ontake) and on some key case studies, including Vulcano and Solfatara volcanoes.
We look forward to meeting you in Naples!
Best wishes,
Tomaso Esposti Ongaro (on behalf of the conveners)
Invited speakers
Prof. Fukashi Maeno (Earthquake Research Institute, University of Tokyo, Japan)
Dr. Bruce Christenson (GNS Science, New Zealand)
Conveners
Tomaso Esposti Ongaro, Istituto Nazionale di Geofisica e Vulcanologia, Italy
Bettina Scheu, Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Munich, Germany
Jean-Christophe Komorowski, Institute de Physique du Globe de Paris, France
Cristian Montanaro, School of Environment, University of Auckland, New Zealand
Mauro Rosi, Dip.to di Scienze della Terra, Università di Pisa, Italy
Corentin Caudron, Department of Geology, Ghent University, Netherlands
Session Abstract
Steam-driven eruptions, often being termed hydrothermal or phreatic eruptions or explosions, are relatively frequent phenomena occurring at active volcanoes, hydrothermal fields and in rather pristine settings, e.g. heralding magmatic/phreatomagmatic eruptions. The circulation of fluids heated by the magmatic source promotes the increase of pore pressures as well as alteration of the host-rock changing its petrophysical properties (e.g. porosity, permeability strength). Overpressurization of the shallow hydrothermal system can develop gas and mixed gas-liquid jets, pyroclastic density currents and lateral blasts, often accompanied by intense ballistic showers, and trigger or be caused by sector collapses or landslides. These phenomena, whose violence depends on the explosivity of the fluids driving them, and on the petrophysical properties of the host- rocks, pose serious threats to populations leaving around active systems and to tourists,
increasingly visiting volcanic and hydrothermal areas. Due to the complex and still largely unknown interaction of the magmatic and hydrothermal systems, steam-driven eruptions are among the most sudden and unpredictable volcanic phenomena. Their study is hindered by the largely incomplete stratigraphic record, the partial understanding of the underlying physical processes, and by the fact that such eruptions often manifest few, low-amplitude and unclear precursors in geophysical and geochemical signals. This session invites contributions from a broad range of disciplines (from eld geological observations to geophysical and geochemical monitoring, from physical modelling to laboratory experiments and numerical simulation) on phreatic and hydrothermal eruptions, including reports and lessons learned from recent events, to summarize our current state of knowledge on steam-driven eruptions and discuss future research directions.
Abstract submission deadline
May 10th, 2018
Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI).
ASU - http://www.asu.edu/ PSU - http://pdx.edu/ GVP - http://www.volcano.si.edu/ IAVCEI - http://www.iavcei.org/
To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxx.
To contribute to the volcano list, send your message to: volcano@xxxxxxx. Please do not send attachments.
==============================================================
