Onset of a submarine eruption east of Mayotte, Comoros archipelago: the first ten months seismicity of the seismo-volcanic sequence (2018–2019)
From 10 May 2018 to 1 November 2022 (time of writing), an unprecedented seismic activity is observed east of Mayotte Island (France), related to the largest submarine eruption ever recorded with offshore geophysical studies. Using signals from regional and local seismic stations, we build a comprehe...
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Académie des sciences
2023-01-01
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| Series: | Comptes Rendus. Géoscience |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.191/ |
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| author | Mercury, Nicolas Lemoine, Anne Doubre, Cécile Bertil, Didier Van Der Woerd, Jérôme Hoste-Colomer, Roser Battaglia, Jean |
| author_facet | Mercury, Nicolas Lemoine, Anne Doubre, Cécile Bertil, Didier Van Der Woerd, Jérôme Hoste-Colomer, Roser Battaglia, Jean |
| author_sort | Mercury, Nicolas |
| collection | DOAJ |
| description | From 10 May 2018 to 1 November 2022 (time of writing), an unprecedented seismic activity is observed east of Mayotte Island (France), related to the largest submarine eruption ever recorded with offshore geophysical studies. Using signals from regional and local seismic stations, we build a comprehensive catalog of the local seismicity for the first ten months of the sequence. This catalog includes a total of 2874 events of magnitude (Mlv) ranging from 2.4 to 6.0, with 77% of them relocated using a double difference location procedure. The hypocentral locations over this period are highly dependent on the small seismic network available. Therefore we compare the locations of later events using a similar network and those estimated from a local ocean bottom seismometer (OBS) network installed since March 2019. Based on the time space evolution and characteristics of the seismicity, five distinct phases can be identified, corresponding to the successive activation of two deep seismic swarms, related to the lithospheric-scale magma ascent up to the seafloor, along with progressive deepening of the seismicity interpreted as decompression of a 40 km deep reservoir. |
| format | Article |
| id | doaj-art-83536c48c5c44be581adbf39e71bfcae |
| institution | OA Journals |
| issn | 1778-7025 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Géoscience |
| spelling | doaj-art-83536c48c5c44be581adbf39e71bfcae2025-08-20T02:08:46ZengAcadémie des sciencesComptes Rendus. Géoscience1778-70252023-01-01354S210513610.5802/crgeos.19110.5802/crgeos.191Onset of a submarine eruption east of Mayotte, Comoros archipelago: the first ten months seismicity of the seismo-volcanic sequence (2018–2019)Mercury, Nicolas0https://orcid.org/0000-0002-7014-3889Lemoine, Anne1https://orcid.org/0000-0002-2545-0193Doubre, Cécile2https://orcid.org/0000-0002-4914-1029Bertil, Didier3https://orcid.org/0000-0002-6258-4043Van Der Woerd, Jérôme4https://orcid.org/0000-0003-1622-2882Hoste-Colomer, Roser5Battaglia, Jean6https://orcid.org/0000-0002-9513-1200BRGM, Department of Risks and Prevention, 3 av. Claude-Guillemin - BP 36009, 45060 Orléans Cedex 2, France; Institut Terre et Environnement de Strasbourg, CNRS UMR 7063, Université de Strasbourg, 5 rue René Descartes, 67084 Strasbourg Cedex, FranceBRGM, Department of Risks and Prevention, 3 av. Claude-Guillemin - BP 36009, 45060 Orléans Cedex 2, FranceInstitut Terre et Environnement de Strasbourg, CNRS UMR 7063, Université de Strasbourg, 5 rue René Descartes, 67084 Strasbourg Cedex, FranceBRGM, Department of Risks and Prevention, 3 av. Claude-Guillemin - BP 36009, 45060 Orléans Cedex 2, FranceInstitut Terre et Environnement de Strasbourg, CNRS UMR 7063, Université de Strasbourg, 5 rue René Descartes, 67084 Strasbourg Cedex, FranceBRGM, Department of Risks and Prevention, 3 av. Claude-Guillemin - BP 36009, 45060 Orléans Cedex 2, FranceLaboratoire Magmas et Volcans, UMR 6524 CNRS, UMR 163 IRD, Université Clermont Auvergne, 6 Av. Blaise Pascal, 63170 Aubière, FranceFrom 10 May 2018 to 1 November 2022 (time of writing), an unprecedented seismic activity is observed east of Mayotte Island (France), related to the largest submarine eruption ever recorded with offshore geophysical studies. Using signals from regional and local seismic stations, we build a comprehensive catalog of the local seismicity for the first ten months of the sequence. This catalog includes a total of 2874 events of magnitude (Mlv) ranging from 2.4 to 6.0, with 77% of them relocated using a double difference location procedure. The hypocentral locations over this period are highly dependent on the small seismic network available. Therefore we compare the locations of later events using a similar network and those estimated from a local ocean bottom seismometer (OBS) network installed since March 2019. Based on the time space evolution and characteristics of the seismicity, five distinct phases can be identified, corresponding to the successive activation of two deep seismic swarms, related to the lithospheric-scale magma ascent up to the seafloor, along with progressive deepening of the seismicity interpreted as decompression of a 40 km deep reservoir.https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.191/Earthquake catalogSeismic swarmsVolcano-seismologySubmarine volcanismMayotteComoros archipelago |
| spellingShingle | Mercury, Nicolas Lemoine, Anne Doubre, Cécile Bertil, Didier Van Der Woerd, Jérôme Hoste-Colomer, Roser Battaglia, Jean Onset of a submarine eruption east of Mayotte, Comoros archipelago: the first ten months seismicity of the seismo-volcanic sequence (2018–2019) Comptes Rendus. Géoscience Earthquake catalog Seismic swarms Volcano-seismology Submarine volcanism Mayotte Comoros archipelago |
| title | Onset of a submarine eruption east of Mayotte, Comoros archipelago: the first ten months seismicity of the seismo-volcanic sequence (2018–2019) |
| title_full | Onset of a submarine eruption east of Mayotte, Comoros archipelago: the first ten months seismicity of the seismo-volcanic sequence (2018–2019) |
| title_fullStr | Onset of a submarine eruption east of Mayotte, Comoros archipelago: the first ten months seismicity of the seismo-volcanic sequence (2018–2019) |
| title_full_unstemmed | Onset of a submarine eruption east of Mayotte, Comoros archipelago: the first ten months seismicity of the seismo-volcanic sequence (2018–2019) |
| title_short | Onset of a submarine eruption east of Mayotte, Comoros archipelago: the first ten months seismicity of the seismo-volcanic sequence (2018–2019) |
| title_sort | onset of a submarine eruption east of mayotte comoros archipelago the first ten months seismicity of the seismo volcanic sequence 2018 2019 |
| topic | Earthquake catalog Seismic swarms Volcano-seismology Submarine volcanism Mayotte Comoros archipelago |
| url | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.191/ |
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