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Cabrera-Pérez I, D'Auria L, Soubestre J, Przeor M, Barrancos J, García-Hernández R, Ibáñez JM, Koulakov I, van Dorth DM, Ortega V, Padilla GD, Sagiya T, Pérez N. Spatio-temporal velocity variations observed during the pre-eruptive episode of La Palma 2021 eruption inferred from ambient noise interferometry. Sci Rep 2023; 13:12039. [PMID: 37491500 PMCID: PMC10368664 DOI: 10.1038/s41598-023-39237-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 07/21/2023] [Indexed: 07/27/2023] Open
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 (< 4 km) and detached from the main cluster of deeper seismicity. We interpret the decrease in seismic velocities and the occurrence of such a shallow earthquake cluster as the effect of hydrothermal fluid released by the ascending magma batch and reaching the surface faster than the magma itself.
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Affiliation(s)
- Iván Cabrera-Pérez
- Instituto Volcanológico de Canarias (INVOLCAN), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain.
| | - Luca D'Auria
- Instituto Volcanológico de Canarias (INVOLCAN), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
- Instituto Tecnológico y de Energías Renovables (ITER), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
| | - Jean Soubestre
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, Univ. Gustave Eiffel, ISTerre, 38000, Grenoble, France
- Icelandic Meteorological Office, Reykjavík, Iceland
| | - Monika Przeor
- Instituto Volcanológico de Canarias (INVOLCAN), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
| | - José Barrancos
- Instituto Tecnológico y de Energías Renovables (ITER), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
| | - Rubén García-Hernández
- Instituto Volcanológico de Canarias (INVOLCAN), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
| | - Jesús M Ibáñez
- Department of Theoretical Physics and Cosmos, Science Faculty, University of Granada, Avd. Fuenteneueva s/n, 18071, Granada, Spain
- Andalusian Institute of Geophysiscs, University of Granada, Campus de Cartuja, C/Profesor Clavera 12, 18071, Granada, Spain
| | - Ivan Koulakov
- Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Prospekt Koptyuga, 3, 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova 2, 630090, Novosibirsk, Russia
- Institute of the Earth's Crust SB RAS, Lermontova 128, Irkutsk, Russia
| | - David Martínez van Dorth
- Instituto Volcanológico de Canarias (INVOLCAN), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
| | - Víctor Ortega
- Instituto Volcanológico de Canarias (INVOLCAN), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
| | - Germán D Padilla
- Instituto Tecnológico y de Energías Renovables (ITER), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
| | - Takeshi Sagiya
- Disaster Mitigation Research Center, Nagoya University, Nagoya, Japan
| | - Nemesio Pérez
- Instituto Volcanológico de Canarias (INVOLCAN), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
- Instituto Tecnológico y de Energías Renovables (ITER), Granadilla de Abona, 38600, Tenerife, Canary Islands, Spain
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