Spatio-temporal velocity variations observed during the pre-eruptive episode of La Palma 2021 eruption inferred from ambient noise interferometry

Autor: Iván Cabrera-Pérez, Luca D’Auria, Jean Soubestre, Monika Przeor, José Barrancos, Rubén García-Hernández, Jesús M. Ibáñez, Ivan Koulakov, David Martínez van Dorth, Víctor Ortega, Germán D. Padilla, Takeshi Sagiya, Nemesio Pérez
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Scientific Reports, Vol 13, Iss 1, Pp 1-9 (2023)
Druh dokumentu: article
ISSN: 2045-2322
DOI: 10.1038/s41598-023-39237-9
Popis: Abstract On Sept. 19th, 2021, a volcanic eruption began on the island of La Palma (Canary Islands, Spain). The pre-eruptive episode was characterized by seismicity and ground deformation that started only 9.5 days before the eruption. In this study, we applied seismic interferometry to the data recorded by six broadband seismic stations, allowing us to estimate velocity variations during the weeks preceding the eruption. About 9.5 days before the eruption, we observed a reduction in the seismic velocities is registered next to the eruptive centers that opened later. Furthermore, this zone overlaps with the epicenters of a cluster of volcano-tectonic earthquakes located at shallow depth (
Databáze: Directory of Open Access Journals
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