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CoV 8. State of knowledge of Merapi eruptive activity with a special focus on 2006 and 2010 eruptions
From: "François Beauducel" <beauducel@xxxxxxx>CoV 8. State of knowledge of Merapi eruptive activity with a special focus on 2006 and 2010 eruptions
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Dear All,
We would like to draw your attention to session [1.V.A.] to be held at Cities on Volcanoes 8, Yogyakarta: « State of knowledge of Merapi eruptive activity with a special focus on 2006 and 2010 eruptions; insights from new multidisciplinary studies of processes associated with magma storage, ascent, and dome destabilization ».
The deadline for abstract submissions is April 14, 2014 (see http://citiesonvolcanoes8.com for further details about the conference).
Session description:
Session description:
Located about 30 km north of the city of Yogyakarta, Mount Merapi is considered as one of the most dangerous volcanoes of Indonesia. The recent eruptive history of Merapi is characterized by recurrent effusive growth of viscous lava domes, with gravitational collapses producing pyroclastic flows known as « Merapi-type nuées ardentes » (VEI 2) and more exceptional explosive eruptions of relatively large size (VEI 3-4), associated with column collapse pyroclastic flows reaching distances larger than 15 km from the summit. The October-November 2010 eruption of Merapi (VEI 4) forced the evacuation of hundreds of thousands inhabitants and caused 347 fatalities, numerous injuries scorched by pyroclastic flows, as well as the destruction of a numerous villages.The eruptive dynamics in 2010 is different from previous eruptions in many ways: the explosivity, especially the beginning of the eruption characterized by a powerful phreatomagmatic blast, the volume of the eruptive magma, the rates of lava dome grew, 2 to 4 m³/s in 2006 (Ratdomopurbo et al., 2013), up to 35 m³/s in 2010 (Surono et al., 2012; Pallister et al., 2013).These different eruptive styles generate drastically different human, structural and environmental impacts. The transition of eruptive style between 2006 and 2010 raises fundamental questions about the dynamics of Merapi: how large eruptions can modify the overall behaviour of the volcano and herald a change in eruptive style to even more explosive activity in contrast to more common effusive activity? How such changes can influence the paradigms of monitoring, forecasting, and risk assessment?To address these issues and in order to identify precursory information from geophysical and geochemical observations that provide indications on the intensity and style of the next eruption, it is essential to analyse and compare the eruptions corresponding to both eruptive styles, including the 2006 and 2010 eruptions, by using multidisciplinary integrated approaches.This is the goal sought by the DOMERAPI project, which involves numerous Indonesian and international Scientists. DOMERAPI proposes a multi-disciplinary approach that involves and integrates petrological, geochemical and geophysical methods and combines field observations, laboratory experiments, and modelling in order to improve our understanding of the magmatic processes and their interplay with eruptive dynamics.Merapi has long been a volcano laboratory. The Indonesian Center for Volcanology and Geologic Hazard Mitigation (CVGHM) monitors Merapi volcanic activity and intends improving knowledge of volcanic processes. Several projects and international researches have also contributed over the past years and decades to a better understanding of how Merapi works.This session invites studies aiming to conduct a retrospective/state of knowledge of Merapi eruptive dynamics, including 2006 and 2010 eruptions, as well as works that address the processes and conditions of magma storage, ascent, the plumbing system and dome destabilization.
Best regards,
François Beauducel, Joko Subandriyo, and Philippe Jousset (session convenors)
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