The number of VLP seismic events (standard values 5-12) is medium, 9.9 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.8 bar (standard values <1 bar). The amplitude of puffing is medium, ~95 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 low, 7. The amplitude of thermal transients is low, 0.5 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 14 m/s.

MODIS thermal anomalies are medium: 19.12 MW (01:30 UTC yesterday).

Rockfall activity is high. The number of rockfalls is 14 per day.

SO₂ flux in the NE sector of the crater terrace is low, 46 t/d

CO₂ flux based on the C/S of 44.65 mesured at 01:20 UTC on 2025/01/06 is high, 2158 t/d

Indice di Attività Vulcanica: high

• Seismic (VLP) rate MEDIUM
• Seismic tremor HIGH
• Puffing MEDIUM
• Acustic pression of explosions LOW
• Thermal activity LOW
• SO₂ flux LOW
• CO₂ flux HIGH
• Rockfall activity HIGH

In the last 24h, Stromboli volcano showed a HIGH degassing activity (puffing/spattering with values of about 95 mbar), associated to MEDIUM explosive activity (max acoustic pressure 0.8 bar). The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (9.9 events/hour). MODIS/VIIRS thermal data shows MEDIUM thermal anomalies. SO2 flux shows LOW values (last: 46 t/d recorded on the 06/01/2025), CO2 flux shows HIGH values (last: 2158 t/d based on C/S value of 44.65 recorded on the 06/01/2025). The rockfall activity is HIGH (14 events detected in the last 24h with LOW pseudo-volumes). The volcanic activity index is HIGH.