Article Dans Une Revue Comptes Rendus. Géoscience Année : 2025

Scientific response to the 2021–2022 seismic swarm in the Monts Dore volcanic province (France): structural insights from punctual surveys (1/2)

Lydie Gailler
Clément Grace
  • Fonction : Auteur
Guillaume Boudoire
Marc Grunberg
Jean Battaglia
Thierry Souriot
Nicolas Cluzel
Romain Guillard
Cyril Aumar
Vincent Boulenger
  • Fonction : Auteur
Solène Buvat
Jehoji Kuzamba
  • Fonction : Auteur
Erwan Thébault

Résumé

Long-dormant volcanic provinces remain excellent proxies in studying active edifices. The Monts Dore volcanic province (French Massif Central) has been recently the site of a unique seismic episode. Geophysical surveys were conducted at different horizontal and vertical spatial scales. Magnetic anomalies highlight mechanical heterogeneities consistent with the regional tectonic context. Low-conductive structures imaged suggest the presence of fluid rising along main paths at various depths. Although we cannot strictly exclude a purely tectonic explanation, our data seem to support the origin of seismicity as being linked to the injection of fluids at depth controlled by internal structural constraints.

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hal-05065079 , version 1 (13-05-2025)

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Lydie Gailler, Clément Grace, Guillaume Boudoire, Marc Grunberg, Jean Battaglia, et al.. Scientific response to the 2021–2022 seismic swarm in the Monts Dore volcanic province (France): structural insights from punctual surveys (1/2). Comptes Rendus. Géoscience, 2025, 357, pp.61 - 78. ⟨10.5802/crgeos.284⟩. ⟨hal-05065079⟩
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