The number of VLP seismic events (standard values 5-12) is medium, 10.5 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.35 bar (standard values <1 bar). The amplitude of puffing is low, ~22.7 mbar.

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

Thermal activity of explosive events is not available. 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: no rockfalls detected.

SO₂ flux in the NE sector of the crater terrace is low, 50 t/d

CO₂ flux based on the C/S of 7.11 mesured at 03:20 UTC on 2025/02/17 is low, 361 t/d

Indice di Attività Vulcanica: medium

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

The volcanic activity is generally characterized by strombolian explosions located at the NE crater sector and degassing (puffing/spattering) located at the NE/C/SW crater sectors. In the last 24h, the Stromboli volcano showed a MEDIUM degassing activity (puffing/spattering with values of about 23 mbar). The explosive activity is MEDIUM (max acoustic pressure 0.35 bar). The volcanic tremor shows MEDIUM values. The number of VLP events shows MEDIUM values (10.5 events/hour). MODIS/VIIRS thermal data shows no thermal anomalies. SO2 flux shows LOW values (last: 50 t/d recorded on the 17/02/2024), CO2 flux shows LOW values (last: 361 t/d based on C/S value of 7.11 recorded on the 17/02/2025). The rockfall activity is LOW (zero events detected). The volcanic activity index is MEDIUM.