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• DOI: 10.5802/crgeos.285
• Publication Date: 2025-05-05T09:48:44Z
• Authors: Guillaume Boudoire; Lydie Gailler; Jean Battaglia; Aude Beauger; Martial Bontemps; Valérie Bosse; Vincent Breton; Danielle Briot; Philippe Cacault; Valérie Cayol; Nicolas Cluzel; Emmanuel Delage; Géraldine Del Campo; Catherine Deniel; Jean-Luc Devidal; Jean-Michel Douchain; Alexandre Faissal; Patrick Freville; Francesco Frondini; Pierre-Jean Gauthier; Nicola Genzano; Clément Grace; Fausto Grassa; Marc Grunberg; Yannick Guéhenneux; Lucia Gurioli; Andrew Harris; Philippe Labazuy; Didier Laporte; Manfredi Longo; Francesco Marchese; Gilles Mazet-Roux; Etienne Médard; Charley Merciecca; Marianne Métois; Nicola Pergola; Manon Pouget; Victoria Rafflin; Edouard Regis; Lisa Ricci; Andrea Luca Rizzo; Thierry Souriot; Luca Terray; Valerio Tramutoli; Cristina Trull-He...; Benjamin van Wyk ...; Olivier Voldoire; Erwan Thebault

During years 2021–2022, an unusual seismic swarm was recorded at crustal level beneath the Monts Dore volcanic province (France). Complementary field and remote measurements were performed. Together with time series on seismological GNSS national networks, these fundamental for monitoring evolution of deciphering its origin. Although a potential vertical migration events is suggested, complementary presumably discard hypothesis magma intrusion shallow level. The ascent CO 2 -rich fluid originating from mantle might instead have reacted hydrothermal system Monts-Dore since least summer 2021 leading to reactivation pre-existing tectonic structures known associated seismicity. Feedback management 2021–2022 prompts several recommendations that should be considered in future better face address issues raised long-dormant provinces mainland France.