The number of VLP seismic events (standard values 5-12) is medium, 11.6 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.59 bar (standard values <1 bar). The amplitude of puffing is high, ~139 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: no thermal anomalies.

Rockfall activity is low. The number of rockfalls is 4 per day.

SO₂ flux in the NE sector of the crater terrace is low, 42 t/d

CO₂ flux based on the C/S of 10.19 mesured at 15:20 UTC on 2025/10/05 is medium, 445 t/d

Indice di Attività Vulcanica: medium

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

The volcanic activity is generally characterized by weak strombolian explosions located at the NE and SW crater sectors and degassing (puffing/spattering) located at NE, C and SW crater sectors. In the last 24h, the Stromboli volcano showed a VERY HIGH degassing activity (puffing/spattering with values of about 139 mbar). The explosive activity is MEDIUM (max acoustic pressure 0.6 bar). The volcanic tremor shows HIGH values. The number of VLP events shows MEDIUM values (11.6 events/hour). MODIS/VIIRS thermal data shows no thermal anomalies. SO2 flux shows LOW values (last: 42 t/d recorded on the 06/10/2025), CO2 flux shows MEDIUM values (last: 445 t/d based on C/S value of 10.19 recorded on the 05/10/2025). The rockfall activity is LOW (n.4 events detected with LOW pseudo-volumes associated). The volcanic activity index is MEDIUM. (NB Recorded data is affected by adverse weather conditions: Strong wind)