Re-pressurized magma at Mt. Etna, Italy, may feed eruptions for years

Abstract Identifying and monitoring the presence of pressurized magma beneath volcanoes allows for improved understanding internal dynamics prediction eruptions. Here we show with time-repeated tomography clear evidence that fresh melts accumulate since 2019 in three reservoirs located at different depths central feeding system. In these volumes, observe a significant reduction seismic wave velocity, an anomaly has endured almost two years. Reservoir re-pressurization induced seismicity clusters around volumes within high fluid pressure compartments. This indicated sharp change volcano behavior, system replacing two-decade-long, flank collapse-dominated dynamics. The volume where velocities are altered is remarkable size, suggesting injection new melt, erupted lava represents only small percentage. Our findings suggest ongoing volcanic recrudescence can persist.