The number of VLP seismic events (standard values 5-12) is medium, 8.7 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.5 bar (standard values <1 bar). The amplitude of puffing is medium, ~50 mbar.

Tiltmeters analysis does not show any significant deformation of the volcano edifice

Thermal activity of explosive events is low. The number of thermal transients in the NE sector of the crater(standard = 100) is not available. The amplitude of thermal transients is not available. Exit velocity of pyroclasts, estimated through thermal camera analysis, is not available.

MODIS thermal anomalies are low: 0.4 MW (01:30 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 1 per day.

SO₂ flux in the NE sector of the crater terrace is low, 24 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

• Seismic (VLP) rate MEDIUM
• Seismic tremor HIGH
• Puffing MEDIUM
• Acustic pression of explosions LOW
• Thermal activity LOW
• SO₂ flux LOW
• CO₂ flux not available
• Rockfall activity LOW

The volcanic activity is generally characterized by strombolian explosions located at the NE and SW crater sectors and a degassing (puffing/spattering) mainly located at SW crater sectors. In the last 24h, the Stromboli volcano showed a HIGH degassing activity (puffing/spattering with values of about 50 mbar) at SW sector. The explosive activity shows MEDIUM values (up to 0.6 bar). The volcanic tremor shows HIGH values. The number of VLP events shows MEDIUM values (8.7 events/hour). MODIS/VIIRS thermal data shows LOW thermal anomalies (< 1 MW). SO2 flux shows LOW values (last: 24 t/d recorded on the 15/10/2025), No CO2 flux measures is available in the last 24h. The rockfall activity is LOW (1 event) with associated LOW pseudo-volumes. The volcanic activity index is MEDIUM. (NB the recorded data are conditioned by the adverse weather conditions: strong wind)