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<dc:title xml:lang="fr">Analyse et contexte de la sismicité des 10 premiers mois de la crise sismo-volcanique de Mayotte (2018-2019)</dc:title>
<dcterms:alternative xml:lang="en">Context and in-depth study of the seismicity of the first 10 months of the Mayotte seismo-volcanic crisis (2018-2019)</dcterms:alternative>
<dc:subject xml:lang="fr">Sismologie</dc:subject>
<dc:subject xml:lang="fr">Sismologie volcanique</dc:subject>
<dc:subject xml:lang="fr">Essaims sismiques</dc:subject>
<dc:subject xml:lang="fr">Catalogues de sismicité</dc:subject>
<dc:subject xml:lang="fr">Volcanisme sous-marin</dc:subject>
<dc:subject xml:lang="fr">Fani Maore</dc:subject>
<dc:subject xml:lang="fr">Mayotte</dc:subject>
<dc:subject xml:lang="fr">Archipel des Comores</dc:subject>
<dc:subject xml:lang="en">Seismology</dc:subject>
<dc:subject xml:lang="en">Volcanic seismology</dc:subject>
<dc:subject xml:lang="en">Seismic swarms</dc:subject>
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<dc:subject xml:lang="en">Offshore volcanism</dc:subject>
<dc:subject xml:lang="en">Submarine eruption</dc:subject>
<dc:subject xml:lang="en">Fani Maore</dc:subject>
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<dcterms:abstract xml:lang="fr">La mise en place du 4e volcan français actif, le Fani Maore à 50 km à l’est de Mayotte estaccompagnée d’une crise sismique sans précédent dans cette région, entre le 10 mai 2018 et aujourd’hui. Le taux de sismicité le plus élevé et les séismes de magnitude forte (jusqu’à Mw 5.9) se concentrent lors des premiers mois d’activité, alors que les réseaux de surveillance sont insuffisants.Ce travail reprend les données sismologiques du 10 mai 2018 au 24 février 2019 afin de construire un catalogue homogène et réduire les incertitudes de localisation. L’analyse de cette sismicité met en évidence l’unicité du phénomène sismo-volcanique à l’est de Mayotte, avec deux essaims distincts mécaniquement différents et une migration du magma sur plusieurs dizaines de kilomètres depuis un réservoir profond.Ce travail cherche à intégrer l’activité de la chaîne volcanique est-Mayotte dans le contexte régional, et présente une étude de la sismicité le long de l’archipel des Comores.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The building of the 4th active French volcano, Fani Maore, 50 km east of Mayotte, is accompanied by an unprecedented seismic crisis in this region, between May 10, 2018 and today. The highest rate of seismicity and earthquakes of strong magnitude (up to Mw 5.9) are concentrated during the first months of activity, while the monitoring networks are insufficient.This work uses seismological data from May 10, 2018 to February 24, 2019 in order to build a homogeneous catalog and lower location uncertainties. The analysis of this seismicity highlights the uniqueness of the seismo-volcanic phenomenon east of Mayotte, with two distinct mechanically different swarms and a migration of magma over several tens of kilometers from a deep reservoir. This work seeks to integrate the activity of the east-Mayotte volcanic chain in the regional context, and presents a study of seismicity along the Comoros archipelago.</dcterms:abstract>
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