Overview
- On the morning of December 27, lava fountains about 150–200 meters high erupted from the Northeast Crater as a new vent opened on the upper eastern flank of the Voragine, feeding a flow toward the Valle del Bove.
- By 10:36 UTC, INGV-Osservatorio Etneo said summit activity had decreased to sporadic ash emissions.
- The extent of the new lava flow remained uncertain pending on-site inspection by observatory teams due to intermittent visibility.
- INGV noted winds carried emissions to the northeast with light ashfall in Taormina and the Piano Provenzana ski area, and intermittent explosions at Bocca Nuova ejected incandescent material several tens of meters.
- Monitoring showed very high volcanic tremor and strong infrasound with measurable ground deformation, prompting a progressive Aviation Color Code escalation to Red and a temporary civil protection alert.