2-2-2-2-2-2-2-2-2-2-2-2-2 From: Druitt Timothy UCA <tim.druitt@xxxxxx> *Notification of two IAVCEI workshops on Santorini (Greece) in 2020* At the request of IAVCEI commissions, we will be organising two specialist workshops on Santorini next year. The aim of this posting is to inform you of these early, so that you may plan your participation accordingly. *Combined workshop of the IAVCEI Commissions on Explosive Volcanism and on Tephra Hazard Modelling (17 to 22 May 2020).* This workshop will take place immediately prior to Cities on Volcanoes (Heraklion, Crete), for a maximum of 30 participants. It will focus on the quantification of hazardous volcanic phenomena based on measurements and modelling of pyroclastic processes and products. Three days of field excursions will examine a wide range of pyroclastic deposits, including welded Plinian fall and pyroclastic current deposits and diverse facies of non-welded ignimbrite and lag deposits. The trip will explore field relationships that can be used to constrain eruptive processes and their hazards to society. During one day focused around theory, lectures will review some state of the art techniques of eruption parameter estimation in the field and laboratory, as well as some numerical modelling tools available in physical volcanology. Participants are expected to make their own way to Santorini by 17 May, then return to Heraklion on 22 May in time for the start of CoV 11 the following day. On Santorini, one day of lectures and modelling exercises (18 May) will be followed by three days of field excursions led by T. Druitt, M. Myers, P. Nomikou and J. Simmons. (19, 20, 21 May). We anticipate a cost of about 500 euros, excluding travel to and from Santorini. This cost may evolve slightly. People potentially interested in participating are invited to contact Tim Druitt at tim.druitt@xxxxxx for further information. *(Note: There will also be a post-CoV field trip to Santorini, organisers P. Nomikou, T. Druitt, and T. Mather. This will be aimed at non-specialist participants of Cities on Volcanoes. It will address the general geology, volcanic processes and cultural impact of Santorini Volcano at a non-specialist level).* *Workshop of the IAVCEI Commission on Collapse Calderas, preceded by an optional short course (17 to 26 September 2020)* This is the biennial Collapse Caldera Workshop (CCW); it will be longer and much broader in scope than the Explosive Volcanism-Tephra Hazards event, and will deal with all aspects of caldera volcanism, from the magmatic root to the marine environment and human population. The two-day short course will accommodate 25 to 30 participants (including lecturers) and will cover such topics as the tectonic-magmatic settings of calderas, caldera eruptions and hazards, crustal magmatic systems beneath calderas, geophysical methods of sounding calderas, remote sensing of calderas, physics and structure of caldera systems, caldera unrest and monitoring, and caldera risk and resilience. The workshop will accommodate the short-course participants plus an extra 20 to 25 (for a total maximum of 50 workshop participants). It will include three field days focussed on the evolution of Santorini, pyroclastic facies and their relationship to caldera formation, architecture and structure of a caldera volcano based on land and submarine records, the unrest of 2011-2012, and the unravelling of a caldera-forming eruption (Late Bronze Age) from its products (fallout, flows, juvenile, cognate and accidental components, petrology, chemistry). The field days will be led by T. Druitt, P. Nomikou and D. Pyle. There will be three days of senior scientist and student led presentations, breakout sessions, and brainstorming with the aim of planning a white paper on fundamental issues of caldera volcanism, unrest, and risk, and the strategies needed to address them (i.e. a multidisciplinary approach). Short course participants would arrive on-island on 17 September, and the course would take place on the 18 and 19. Workshop-only participants would arrive on 19 September and the workshop would take place on 20-25, with all participants leaving on 26 September. The cost of the workshop would be about 750 euros, and that of the short course an extra 300 euros. These prices exclude travel to and from Santorini and may evolve slightly. People potentially interested in participating (either short course plus workshop, or just workshop) are invited to contact Tim Druitt at tim.druitt@xxxxxx for further information. 2-2-2-2-2-2-2-2-2-2-2-2-2 ============================================================== 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 - https://www.iavceivolcano.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. 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