Articles | Volume 23, issue 5
https://doi.org/10.5194/nhess-23-1743-2023
https://doi.org/10.5194/nhess-23-1743-2023
Research article
 | 
12 May 2023
Research article |  | 12 May 2023

Clustering of eruptive events from high-precision strain signals recorded during the 2020–2022 lava fountains at the Etna volcano (Italy)

Luigi Carleo, Gilda Currenti, and Alessandro Bonaccorso

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Cited articles

Amoruso, A., Crescentini, L., Scarpa, R., Bilham, R., Linde, A. T., and Sacks, S. I.: Abrupt magma chamber contraction and microseismicity at Campi Flegrei, Italy: Cause and effect determined from strainmeters and tiltmeters, J. Geophys. Res.-Sol. Ea., 120, 5467–5478, https://doi.org/10.1002/2015JB012085, 2015. 
Andronico, D., Cannata, A., Di Grazia, G., and Ferrari, F.: The 1986–2021 paroxysmal episodes at the summit craters of Mt. Etna: Insights into volcano dynamics and hazard, Earth-Sci. Rev., 220, 103686, https://doi.org/10.1016/j.earscirev.2021.103686, 2021. 
Bonaccorso, A. and Calvari, S.: A new approach to investigate an eruptive paroxysmal sequence using camera and strainmeter networks: Lessons from the 3–5 December 2015 activity at Etna volcano, Earth Planet. Sc. Lett., 475, 231–241, https://doi.org/10.1016/j.epsl.2017.07.020, 2017. 
Bonaccorso, A., Calvari, S., Linde, A. T., Sacks, S. I., and Boschi, E.: Dynamics of the shallow plumbing system investigated from borehole strainmeters and cameras during the 15 March, 2007 Vulcanian paroxysm at Stromboli volcano, Earth Planet. Sc. Lett., 357–358, 249–256, https://doi.org/10.1016/j.epsl.2012.09.009, 2012. 
Bonaccorso, A., Calvari, S., Currenti, G., Del Negro, C., Ganci, G., Linde, A. T., Napoli, R., Sacks, S. I., and Sicali, A.: From source to surface: dynamics of Etna's lava fountains investigated by continuous strain, magnetic, ground and satellite thermal data, B. Volcanol., 75, 1–12, https://doi.org/10.1007/s00445-013-0690-9, 2013a. 
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Short summary
Lava fountains at the Etna volcano are explosive eruptions that pose a serious threat to civil infrastructure and aviation. Their evolution from weak explosion to sustained eruptive column is imprinted in tiny ground deformations caught by strain signals with diverse duration and amplitude. By performing a clustering analysis on strain variations, we discover a transition among four eruptive styles, providing useful hints for volcano monitoring and hazard assessment.
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