4th International Workshop on Collapse September 23-29, 2012, Vulsini Calderas,

Organizers:

Acocella Valerio Dipartimento Scienze Geologiche Roma Tre, Roma Italy. [email protected]

Geyer Adelina Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), Barcelona, Spain. [email protected]

http://www.gvb-csic.es/CCC.htm

What is the Workshop on Collapse Calderas? The IAVCEI Commission on Collapse Calderas (CCC) was created in March 2008 to have a wider and deeper understanding on calderas. The idea to file for a commission emerged in 2005, during a workshop on Volcanism, at which the Collapse Calderas Work Group was formed. The CCC (http://www.gvb-csic.es/CCC.htm) includes a wide spectrum of disciplines, such as caldera geology, geophysics, mathematical and analogue modelling, subcaldera magma chamber processes, volcanic hazard and risk management, economic benefits and environmental research. Thus, it promotes interdisciplinary interaction to help solve the many questions regarding the formation of collapse calderas, their evolution, and affect on society. Successful workshops are organized on regular basis, and have been previously held at Tenerife, Canarias, (2005), Mexican Volcanic Belt (2008) and Reunion Island (2010).

Venue The 4th Workshop on Collapse Calderas is scheduled for September 23-29, 2012, at the charming Hotel Royal (http://www.atihotels.it/hotelroyal/en/index.asp) in Bolsena, on the shore of the Bolsena Lake. Bolsena is an appealing typical Italian middle-aged village on the edge of the most collapsed part of the Bolsena caldera, that is the most distinctive feature of the Vulsini Calderas District, located 100 km north of . The Vulsini District is a worldwide famous type-locality where many fundamental concepts on the eruptive dynamics, particularly those related to caldera-forming episodes, have been proposed. These include the definition of the criteria to describe, classify and interpret the pyroclastic deposits, as well as their modalities of transport and sedimentation. Meeting point for the workshop is scheduled for the early afternoon of September 23 on the west exit of the main train (Termini) station in Rome, where a bus bound to Hotel Royal will depart at 14:00.

Workshop outline The workshop, consistently with the previous meetings, will be devoted at understanding the different aspects related to calderas, including their structure and development, the erupted products and eruptive history, the magmatic processes, the geophysical and geochemical signature, the mathematical and analogue models, as well as the related economic and environmental research. In addition, in this workshop particular emphasis will be given at understanding caldera unrest. An increasing amount of geodetic and monitoring data worldwide indicates that a significant part of calderas undergo unrest, with surface displacements, seismicity and degassing induced by the magmatic and/or hydrothermal system. However, most of these unrests do not result in eruptions. Understanding caldera unrest, as well as its possible relations with volcanic activity, is therefore crucial for any hazard evaluation. To this aim, geodetic and monitoring studies of active calderas are particularly encouraged. The workshop will consist of 2 full days of scientific meeting (September 24 and 25), with oral and poster sessions, and 3 days of field trip (September 26, 27 and 28) at Bolsena, and Vico calderas. The field trips foresee the participation of some of the most distinguished Italian volcanologists who have been working in the area, including Bruno Capaccioni, Raffaello Cioni, Donatella de Rita, Mario Gaeta, Guido Giordano, Patrizia Landi, Giovanni Nappi, Danilo Palladino, Alberto Renzulli, Mauro Rosi, Raffaello Trigila and Luigina Vezzoli. Thematic informal discussions are planned in the evenings.

Costs The fee for participants to the workshop is 700 euros. It includes transportation from Rome to Bolsena (on the 23rd) and from Bolsena to Roma (on the 29th), all meals and accommodation in double rooms from the evening of the 23rd to the morning of the 29th (6 nights), the ice-breaker cocktail, 3 days of excursions, the registration to the meeting, the abstract volume and the field-trip guidebook. Very limited financial support may be available for students submitting a request letter attached to the abstract.

Deadlines - Abstract submission: March 31, 2012. - Registration deadline: April 30, 2012. - Registration between May 1 and July 31 will charge 70 additional euros to the 700 euros fee. - Registration after July 31, including online registration, will not be possible. - Deadline for financial aid request for students: March 1, 2012.

The workshop will be limited to 60 participants, with a first-come, first-served basis. We recommend to register as soon as possible, and not to wait for the deadline, to assure your participation to this event. For any information, please contact Valerio Acocella ([email protected])

Courtesy: R. Trigila