Dear colleagues, We would like to invite you to submit a contribution to our session *GMPV 8.9 Dynamics and timescales in magmatic reservoirs, conduits and dikes**, *which will be held at the next EGU meeting in Vienna, 14-19 April 2024. This session aims to collect contributions investigating the dynamics of magmatic processes by laboratory experiments, numerical models, and analytical observations of natural samples, to further understand pre-eruptive magma dynamics and the evolution of volcanic plumbing systems. The abstract submission deadline is* Wednesday, 10 January 2024, 13:00 CET. *Guidelines for abstract submission can be found at https://www.egu24.eu/programme/how_to_submit.html We hope to see you in Vienna! Kind regards, Fabio Arzilli, Maurizio Petrelli, Mónica Ágreda López, Yishen Zhang, Giuseppe La Spina *Session abstract:* Investigating the dynamics and timescales of magmatic processes is key to understanding the storage, emplacement, ascent, mobility, and eruptibility of magmas. This in turn provides insights to enable the characterisation of volcanic hazards and to inform governmental agencies who develop mitigation strategies. During the last few decades, our knowledge of volcanic systems has significantly improved such that we now know that the eruptive activity of volcanoes is governed by a combination of many different processes, often following non-linear behaviour and acting on multiple timescales. These processes include crystal dissolution, diffusive re-equilibration in mushy magma reservoirs, volatile exsolution, crystal growth kinetics, and rheological transitions during magma ascent within conduits and dikes. A thorough understanding of the interplay between crystallisation kinetics, magma mixing, decompression, degassing, and the related timescales is fundamental to improving our knowledge of the evolution of volcanic plumbing systems, triggering mechanisms, and eruptive style transitions. In this session, we aim to bring together studies that investigate the dynamics of magmatic processes by laboratory experiments, numerical models, and analytical observations of natural samples. We welcome multidisciplinary contributions from mineralogy, volcanology, petrology, and geochemistry to further our understanding of pre-eruptive magma dynamics and the evolution of volcanic plumbing systems. -- Dr. Fabio Arzilli University of Camerino School of Science and Technology, Geology Division Via Gentile III da Varano, 7 62032, Camerino (MC), Italy Twitter: @Fabio_Arzilli ResearchGate: https://www.researchgate.net/profile/Fabio-Arzilli --