Seismic and thermal precursors of crater collapses and overflows at Stromboli volcano.

Autor: Giudicepietro F; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy. flora.giudicepietro@ingv.it., Calvari S; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Piazza Roma 2, 95125, Catania, Italy., De Cesare W; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy., Di Lieto B; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy., Di Traglia F; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy., Esposito AM; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy., Orazi M; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy., Romano P; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy., Tramelli A; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy., Nolesini T; Università degli Studi di Firenze, Centro per la Protezione Civile, Piazza San Marco 4, 50121, Firenze, Italy., Casagli N; Università degli Studi di Firenze, Dipartimento di Scienze della Terra, Via La Pira 4, 50121, Firenze, Italy.; National Institute of Oceanography and Applied Geophysics - OGS, Borgo Grotta Gigante 42/C, 34010, Sgonico (Trieste), Italy., Calabria P; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy., Macedonio G; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Jul 10; Vol. 13 (1), pp. 11115. Date of Electronic Publication: 2023 Jul 10.
DOI: 10.1038/s41598-023-38205-7
Abstrakt: Lava overflows are highly hazardous phenomena that can occur at Stromboli. They can destabilize the crater area and the "Sciara del Fuoco" unstable slope, formed by several sector collapses, which can generate potentially tsunamigenic landslides. In this study, we have identified precursors of the October-November 2022 effusive crisis through seismic and thermal camera measurements. We analyzed the lava overflow on October 9, which was preceded by a crater-rim collapse, and the overflow on November 16. In both cases, seismic precursors anticipating the overflow onset have been observed. The analysis of the seismic and thermal data led to the conclusion that the seismic precursors were caused by an escalating degassing process from the eruptive vent, which climaxed with the overflows. Volcano deformation derived from ground-based InSAR and strainmeter data showed that inflation of the crater area accompanied the escalating degassing process up to the beginning of the lava overflows. The inflation of the crater area was especially evident in the October 9 episode, which also showed a longer seismic precursor compared to the November 16 event (58 and 40 min respectively). These results are important for understanding Stromboli's eruptive mechanisms and open a perspective for early warning of potentially dangerous phenomena.
(© 2023. The Author(s).)
Databáze: MEDLINE
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