1-1-1-1-1-1-1-1-1-1-1-1-1-1 From: Nicole Metrich <metrich@xxxxxxx> Dear colleague, We would like to send this call for contributions to a special issue of the Bulletin of Volcanology via volcano listserv Paroxysmal eruptions at basaltic volcanoes Paroxysms at basaltic volcanoes are now recognised as being major to understand the magmatic processes and their associated hasardeous aspects. A paroxysmal activity can be defined both in term of large expelled magma volumes or by being far more energetic than typical. The first type includes very voluminous flank eruptions at the rift-zone of volcanoes, such as during the 2018 eruptions at Ambrym (Vanuatu) and Kilauea (Hawaii) and at Nyiragongo (Democratic Republic of Congo) in 1974 and 2002. The second type corresponds to the basaltic high-level eruptive column, a very contrasted regime when compared to typical basaltic activity, such as moderate lava flows, Strombolian activity and high-level lava fountains. It includes Shishaldin (Alaska), pre-Yasur volcanism (Vanuatu), Masaya (Nicaragua) and Villarica (Chile). The present-day paroxysmal activity at Stromboli (Italy) represents a more modest manifestation of what could be a basaltic paroxysm. Some volcanoes combine both effusive and explosive paroxysms, such as Mt Etna (Italy). Two of the main remaining questions include 1) the understanding of mechanisms prevailing to the observed magma ascent rate and how to reconcile the very large range of values obtained by different methods; 2) assessing whether paroxysmal activity is an extreme manifestation of the typical activity or a discontinuous and entirely new process. The goal of this special issue is to call for papers dealing or/and combining 1) stratigraphic records, geophysical measurements (seismic, infrasound and deformation, �.) and satellite data (degassing, thermal and imaging, �); 2) mineralogical and geochemical analysis of magma and gas surface emissions with typical timescales; 3) thermo-dynamical modelling of volatile behaviour, magma viscosity and ascent rate; 4) physical processes associated to degassing; 5) deep magmatic re-injection and the response of the overlying plumbing system. Studies at any volcano presenting one of several of the above features are encouraged. Here we only consider purely magmatic episodes. First submission: from now to end of March 2025 Last final acceptation: end of Sept 2025 Editors: Sylvie Vergniolle and Nicole Métrich vergniolle@xxxxxxx metrich@xxxxxxx 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ------------------------------
