The number of VLP seismic events (standard values 5-12) is medium, 8.2 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.4 bar (standard values <1 bar). The amplitude of puffing is medium, ~80 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 1 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 13.8 mesured at 07:20 UTC on 2026/01/09 is medium, 1154 t/d

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 MEDIUM
• Rockfall activity LOW

In the last 24h, Stromboli volcano showed HIGH degassing activity (puffing/spattering with values of about 80 mbar) located at SW sector, associated with MEDIUM VALUES of infrasonic pressure at both crater sectors of NE and SW (max. acoustic pressure 0.5 bar). The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (8.2 events/hour). MODIS and VIIRS satellite images do not show Lhermal anomalies. SO2 flux is LOW (46 t/d). The CO2 flux, retrieved by a C/S ratio of 13.8 recorded at 07:20UTC of today, is MEDIUM (1154 t/d). The rockfall activity is LOW, with 1 event(s) detected in the past 24 hours. The Volcanic Activity Index is MEDIUM.