Seismic Tomography of a Newborn Volcano

Abstract On 19 September 2021, in La Palma, Canary Islands (Spain), a new volcano, later named Tajogaite, erupted. We determined the shallow seismic tomography model of Tajogaite Volcano, including the 3D distributions of Vp, Vs, and Vp/Vs. The tomography of the volcanic edifice has been performed using a combination of a three‐component amplitude method for seismic event detection and a sophisticated deep neural network method for picking first arrival times, which allowed the detection and the picking of thousands of earthquakes from a data set recorded by a temporary network deployed around the main crater just a few months after the end of the eruption. We identified shallow low Vp/Vs and deeper high Vp/Vs anomalies, which we interpret as changes in the fluid filling the rocks, transitioning from liquid to steam at shallower low‐pressure conditions. Our work highlights, for the first time, the internal structure of a monogenetic volcano, specifically its evolving local hydrothermal system, right after its eruption.

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Publication Details

Journal
Geophysical Research Letters
Published
2025-09-19
DOI
https://doi.org/10.1029/2025gl114932
Citations
5
Primary Topic
Seismic Waves and Analysis
Type
article
Field-Weighted Citation Impact
9.33
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Seismic Tomography of a Newborn Volcano

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article en
5 citations

Abstract

Abstract On 19 September 2021, in La Palma, Canary Islands (Spain), a new volcano, later named Tajogaite, erupted. We determined the shallow seismic tomography model of Tajogaite Volcano, including the 3D distributions of Vp, Vs, and Vp/Vs. The tomography of the volcanic edifice has been performed using a combination of a three‐component amplitude method for seismic event detection and a sophisticated deep neural network method for picking first arrival times, which allowed the detection and the picking of thousands of earthquakes from a data set recorded by a temporary network deployed around the main crater just a few months after the end of the eruption. We identified shallow low Vp/Vs and deeper high Vp/Vs anomalies, which we interpret as changes in the fluid filling the rocks, transitioning from liquid to steam at shallower low‐pressure conditions. Our work highlights, for the first time, the internal structure of a monogenetic volcano, specifically its evolving local hydrothermal system, right after its eruption.

Geophysical Research LettersVol. 52(18)
University of Geneva (CH), Skolkovo Institute of Science and Technology (RU), Universidad de Granada (ES), Istituto Nazionale di Geofisica e Vulcanologia (IT), Instituto Tecnológico y de Energías Renovables (ES), Institute of Petroleum Geology and Geophysics (RU), Sarmap (Switzerland) (CH), Instituto Volcanológico de Canarias (ES), INGV Osservatorio Etneo, INGV Osservatorio Vesuviano
Openalex Percentile: Top 2%
Seismic Waves and Analysis
9.33
DOIOpen Access PDFOpenAlex
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