Abstract
AbstractIdentifying and monitoring the presence of pressurized magma beneath volcanoes allows for improved understanding of internal dynamics and prediction of eruptions. Here we show with time-repeated tomography clear evidence that fresh melts accumulate since 2019 in three reservoirs located at different depths in the central feeding system. In these three volumes, we observe a significant reduction of seismic wave velocity, an anomaly that has endured for almost two years. Reservoir re-pressurization induced seismicity clusters around the pressurized volumes within high fluid pressure compartments. This indicated a sharp change in volcano behavior, with re-pressurization of the central system replacing two-decade-long, flank collapse-dominated dynamics. The volume where the velocities are altered is remarkable in size, suggesting the injection of new melt, and that erupted lava represents only a small percentage. Our findings suggest that ongoing volcanic recrudescence can persist.
Funder
This study has benefited from funding provided by the Italian Presidenza del Consiglio dei Ministri – Dipartimento della Protezione Civile (DPC).
Publisher
Springer Science and Business Media LLC
Subject
General Earth and Planetary Sciences,General Environmental Science
Reference48 articles.
1. Patanè, D., Cocina, O., Falsaperla, S., Privitera, E. & Spampinato, S. Mt. Etna volcano: a seismological framework. Mt. Etna Volcano, Geophys. Monogr. Ser,. 143, 147–165 (2004).
2. Pezzo, G. et al. Flank sliding: a valve and a sentinel for paroxysmal eruptions and magma ascent at Mount Etna, Italy. Geology 48, 1077–1082 (2020).
3. Branca, S., Coltelli, M., Groppelli, G. & Lentini, F. Geological map of Etna volcano, 1: 50,000 scale. Italian J. Geosci. 130, 265–291 (2011).
4. Doglioni, C., Innocenti, F. & Mariotti, S. Why Mt. Etna? Terra Nova 13, 25–31 (2001).
5. Barreca, G. et al. Slab detachment, mantle flow, and crustal collision in eastern Sicily (southern Italy): Implications on Mount Etna volcanism. Tectonics 39, e2020TC006188 (2020).
Cited by
10 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献