The number of VLP seismic events (standard values 5-12) is high, 16.5 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is medium, 1.33 bar (standard values <1 bar). The amplitude of puffing is low, ~35 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 medium: 10 MW (00:48 UTC yesterday).

Rockfall activity: no rockfalls detected.

SO₂ flux in the NE sector of the crater terrace is medium, 117 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

The volcanic activity is generally characterized by strombolian explosions located at the NE crater sector and degassing (puffing/spattering) located at NE and SW crater sectors. Spattering is characterized by MEDIUM values of pressure and this activity is correlated with seismic tremor characterized by HIGH values In the last 24h, the Stromboli volcano showed a MEDIUM degassing activity (puffing/spattering with values of about 35 mbar). The explosive activity is HIGH (max acoustic pressure 1.33 bar). The volcanic tremor shows MEDIUM values. The number of VLP events shows HIGH values (16.5 events/hour). MODIS/VIIRS thermal data shows MODERATE thermal anomalies (max 10 MW). SO2 flux shows MEDIUM values (last: 117 t/d recorded on the 15/11/2025), CO2 flux shows no new data (last: 606 t/d based on C/S value of 11.64 recorded on the 09/11/2025). The rockfall activity is LOW (zero events detected). The volcanic activity index is MEDIUM.