Year: 2025
Type: article
Abstract: The recent installation of new broadband seismic stations in the French Massif Central (FMC) has resulted in the detection of a few “deep” earthquakes located near the crust‐mantle boundary beneath volcanic regions. Analysis of the spectral content of the respective waveforms has shown that the spectra of these “deep” earthquakes are significantly depleted in high frequencies. Based on these observations of anomalous depth and spectral content, these earthquakes can be classified as Deep Long Period (DLP) events. This is a specific class of volcanic seismicity observed beneath many active volcanoes around the World. While the exact physical origin of this type of earthquakes is still debated, they are often considered as indicators of the presence of magma near the crust‐mantle boundary. Therefore, observation of DLP earthquakes can bring new insights into understanding the state and the activity of the recent FMC volcanoes.
Source: Geophysical Research Letters
DOI: 10.1029/2025gl114904
Institutions: Centre National de la Recherche Scientifique, Institut des Sciences de la Terre, Université Gustave Eiffel, Institut de Recherche pour le Développement, Université Savoie Mont Blanc, Université Grenoble Alpes, Université Toulouse III - Paul Sabatier, Observatoire Midi-Pyrénées, Géosciences Environnement Toulouse, Geological Survey of Denmark and Greenland, Institut de Recherche en Astrophysique et Planétologie, Université Clermont Auvergne, Laboratoire Magmas et Volcans, Istituto Nazionale di Geofisica e Vulcanologia, INGV Sezione di Palermo
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,190
OpenAlex ID: W4411412252