2-2-2-2-2-2-2-2-2-2-2-2-2 From: "Társilo Girona" <tarsilo.girona@xxxxxxxxxx> Dear Colleagues, Consider submitting your best abstracts to the following sessions of Cities on Volcanoes 11, which is taking place in the sunny Heraklion, Crete (Greece), and online! These sessions aim to gather multidisciplinary contributions with main focus on geophysics (S2.16), petrology/geochemistry (S2.17), and modeling of volcanic processes (S2.18). The abstract submission deadline is February 13th, 2022. *Session: S2.16 > What do volcano seismo-acoustic signals mean?* *Field*: Geophysics *Abstract*: Connecting seismic and acoustic signals recorded around volcanoes to subsurface and subaerial processes is crucial for improving monitoring, as well as for eruption forecasting and characterization. In particular, combining seismic and acoustic data with theoretical, numerical, conceptual, and probabilistic models has become essential to identify repetitive patterns, the opening of fractures and cracks beneath the surface, the transfer of magma through the crust and shallow subsurface, the accumulation of gases beneath volcanic craters, eruptive activity of varied styles, surficial mass movements, or the sensitivity of volcanoes to external forces (e.g., far-field earthquakes, tidal stresses). In this session,we invite contributions focused on the study of seismic and/or acoustic signals around volcanoes and the robust interpretation of these signals. We encourage presentations that combine seismic and/or acoustic data with other observables, data science, and cutting-edge modeling techniques aiming to shed light on new monitoring strategies to better forecast the onset, duration, intensity, and end of volcanic events. *Invited Speaker:* Liam Toney (Geophysical Institute, University of Alaska Fairbanks). Presentation: "Seismoacoustic characterization of very large iceâ??rock avalanches on Iliamna Volcano, Alaska, USA". *Conveners*: Társilo Girona (Geophysical Institute, University of Alaska Fairbanks, USA) Arthur Jolly (USGS, Hawaiian Volcano Observatory, USA) Phillippe Lesage (Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Chambéry, France). Robin Matoza (University of California, Santa Barbara, CA, United States of America) Corentin Caudron (Université Libre de Bruxelles, Belgium) *Session: S2.17 > Time after time* *Field*: Petrology, Geochemistry - multidisciplinary *Abstract*: Unraveling the timescales at which magmatic processes take place at depth prior to eruption is crucial to improve the interpretation of monitoring data. In particular, the combination of petrological and geochemical analyses with monitoring data has become an essential working strategy to understand the reactivation of magmatic plumbing systems, and therefore to improve the interpretation of the eruption precursors and potentially improve the forecasting of volcanic activity. In this session, we invite contributions focused on the timescales of magmatic processes and the evolution of plumbing systems,especially proposing a timeline of the magmatic system evolution. We encourage presentations connecting processes at depth to ground-based and satellite-based monitoring data, including but not limited to seismicity, deformation, gas and heat emissions. *Invited Speaker:* Terry Plank (Lamont-Doherty Earth Observatory, Columbia University, USA). Presentation: "Counting the Minutes before Eruption". *Conveners*: Helena Albert (University of Barcelona, Spain) Társilo Girona (Geophysical Institute, University of Alaska Fairbanks, USA) *Session: S2.18 > Linking remote and local monitoring data through physical volcano models to understand and forecast unrest* *Field*: Modeling - multidisciplinary *Abstract*: Unraveling the timescales at which magmatic processes take place at depth prior to eruption is crucial to improve the interpretation of monitoring data. In particular, the combination of petrological and geochemical analyses with monitoring data has become an essential working strategy to understand the reactivation of magmatic plumbing systems, and therefore to improve the interpretation of the eruption precursors and potentially improve the forecasting of volcanic activity. In this session, we invite contributions focused on the timescales of magmatic processes and the evolution of plumbing systems,especially proposing a timeline of the magmatic system evolution. We encourage presentations connecting processes at depth to ground-based and satellite-based monitoring data, including but not limited to seismicity, deformation, gas and heat emissions. *Invited Speaker:* Tara Shreve (Carnegie Institution for Science, Washington DC, USA). Presentation: "Unravelling the link between passive gas emissions, reservoir depressurization and eruption at Ambrym volcano (Vanuatu)". *Conveners*: Paul Lundgren (Jet Propulsion Laboratory, California Institute of Technology, CA, United States of America) Kevin Reath (Cornell University, Ithaca, NY, United States of America) Társilo Girona (Geophysical Institute, University of Alaska Fairbanks, USA) Mary Grace Bato (Jet Propulsion Laboratory, California Institute of Technology, CA, United States of America) 2-2-2-2-2-2-2-2-2-2-2-2-2 ------------------------------
