Pressurization and depressurization phases inside the plumbing system of Mount Etna volcano: Evidence from a multiparametric approach

A sudden explosion at Mount Etna's Bocca Nuova crater on September 5, 2013, triggered an instantaneous depressurization of the volcano's plumbing system, halting a gradual pressurization phase observed between April and September. This shift was detected through multiparametric monitoring, including long-period (LP) events, volcanic tremor, geodetic inflation-deflation data, and CO2 flux measurements. The explosion also activated a new infrasonic source at Bocca Nuova, while the New Southeast Crater resumed activity, leading to a second lava fountain cycle. Pressure source depths were estimated at 3–9 km below sea level using geodetic and CO2 data, providing insights into the volcano's dynamic subsurface processes.

Cannata, A., Spedalieri, G., Behncke, B., Cannavò, F., Di Grazia, G., Gambino, S., Gresta, S., Gurrieri, S., Liuzzo, M., & Palano, M. (2015). Pressurization and depressurization phases inside the plumbing system of Mount Etna volcano: Evidence from a multiparametric approach. Journal of Geophysical Research: Solid Earth, 120(9), 5965–5982. Portico. https://doi.org/10.1002/2015jb012227