Seismic catalogues of the 2018-2019 volcano-seismic crisis offshore Mayotte, Comoro Islands


In May 2018 a volcano-seismic sequence accompanied the upward migration of a magmatic intrusion from Moho depth to the seafloor led to the drainage of the deep magmatic reservoir and to the birth of a submarine volcano offshore the island of Mayotte, Comoro Islands. This process of magma transport was accompanied by an intense seismic swarm and peculiar long-duration very long period signals. Between 1 January 2018 and 1 May 2019 we detected 407 sources of very long period signals and 6990 volcano-tectonic earthquakes. This report collects detection, location and source parameters catalogs for these two sets of earthquake sources. This data publication provides the catalogues of very long period (VLP) signals and volcano-tectonic (VT) earthquakes, as discussed in Cesca et al. (2019). Here, methods and data used to create the different catalogues are only briefly discussed; a more accurate description is given in Cesca et al. (2019), which furthermore discusses the different processes of dike migration, undersea eruption, deep reservoir drainage and overburden sagging which are responsible for the seismic activity.

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Creator Cesca, Simone ORCID logo; Heimann, Sebastian; Letort, Jean; Razafindrakoto, Hoby N. T. (ORCID: 0000-0002-7717-280X); Dahm, Torsten ORCID logo; Cotton, Fabrice
Publisher GFZ Data Services
Contributor Cesca, Simone; Heimann, Sebastian; Letort, Jean; Razafindrakoto, Hoby N. T.; Dahm, Torsten; Cotton, Fabrice
Publication Year 2019
Rights CC BY 4.0;
OpenAccess true
Contact Cesca, Simone (GFZ German Research Centre for Geosciences Potsdam, Germany)
Language English
Resource Type Dataset
Format application/octet-stream
Size 2 Files
Version 1.0 (October 2019)
Discipline Geosciences; Geospheric Sciences; Natural Sciences; Volcanology
Spatial Coverage (45.000W, -13.500S, 46.500E, -12.000N)