Roche Olivier auteur aut IRD Andanson J. M. auteur aut IRD Dequidt A. auteur aut IRD Huber C. auteur aut IRD Bachmann O. auteur aut IRD Pinel D. auteur aut IRD text journalArticle eng text/pdf born digital access The nucleation of gas bubbles in magmas is fundamental to controlling the dynamics of volcanic eruptions. In this study, we addressed nucleation in a volatile-saturated liquid triggered by viscous shear, which is ubiquitous in volcanic environments. By combining laboratory experiments, theoretical analysis, and numerical simulations, we investigated the conditions under which the mechanical energy associated with shearing favors the formation and growth of gas molecule nuclei in a liquid supersaturated with volatiles. Our results reveal that the critical shear stress for nucleation decreases as the volatile supersaturation increases. Dimensional analysis applied to natural systems shows that shear-induced nucleation is likely to occur in volcanic conduits, which has implications for magma degassing processes and eruptive styles. specialized 066 020 390 6773 633-637 2025 0036-8075 https://www.documentation.ird.fr/hor/fdi:010096303 10.1126/science.adw8543 0036-8075 [F B010096303] https://www.documentation.ird.fr/hor/fdi:010096303 https://www.documentation.ird.fr/intranet/publi/2026-03/010096303.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2026-03-11 2026-03-11 fdi:010096303 fre