Publication Date:
2022-05-06
Description:
After a period of mild eruptive activity, Stromboli showed between 2017 and 2018 a
reawakening phase, with an increase in the eruptive activity starting in May 2017. The alert level of the volcano was raised from “green” (base) to “yellow” (attention) on 7 December 2017, and a small lava overflowed the crater rim on 15 December 2017. Between July 2017 and August 2018 the monitoring networks recorded nine major explosions, which are a serious hazard for Stromboli because they affect the summit area, crowded by tourists. We studied the 2017–2018 eruptive phase through the analysis of multidisciplinary data comprising thermal video-camera images, seismic, geodetic and geochemical data. We focused on the major explosion mechanism analyzing the well-recorded 1 December 2017 major explosion as a case study. We found that the 2017–2018 eruptive phase is consistent with a greater gas-rich magma supply in the shallow system. Furthermore, through the analysis of the case study major explosion, we identified precursory phases in the strainmeter and seismic data occurring 77 and 38 s before the explosive jet reached the eruptive vent, respectively. On the basis of these short-term precursors, we propose an automatic timely alarm system for major explosions at Stromboli volcano.
Description:
This work benefited of the EU (DG ECHO) Project EVE n. 826292 and of the project INGV-FISR-2017 “Sale Operative Integrate e Reti di Monitoraggio del futuro: l’INGV 2.0”. The data used in this study were provided by the Istituto Nazionale di Geofisica e Vulcanologia (Osservatorio Vesuviano, Osservatorio Etneo and Sezione di Palermo).
Description:
Published
Description:
id 1813
Description:
4V. Processi pre-eruttivi
Description:
JCR Journal
Keywords:
Stromboli volcano
;
multidisciplinary monitoring of volcanoes
;
explosive eruptions
;
volcano ground-based remote sensing
;
volcanic risk mitigation
;
experimental geophysics
;
volcano timely alarm
;
strainmeter
;
volcano early warning
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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