The number of VLP seismic events (standard values 5-12) is medium, 9.5 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.27 bar (standard values <1 bar). The amplitude of puffing is medium, ~50 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 are low: 3 MW (01:42 UTC today).

Rockfall activity is medium. The number of rockfalls is 8 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 70 t/d

CO₂ flux based on the C/S of 9.07 mesured at 13:20 UTC on 2025/09/07 is medium, 642 t/d

Indice di Attività Vulcanica: medium

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

In the last 24h, Stromboli volcano showed HIGH degassing activity (puffing/spattering with values of about 50 mbar) located at SW sector, associated to explosions with MEDIUM acoustic pressures (max. 0.27 bar). The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (9.5 events/hour). MODIS and VIIRS satellite images show LOW thermal anomalies (max 3 MW). SO2 flux is MEDIUM (70 t/d). CO2 flux, based on the C/S ratio of 9.07 measured on 07/09/2025 at 13:20 UTC, is MEDIUM (642 t/d). The rockfall activity is MEDIUM, with 8 evens detected in the past 24 hours having LOW seismic energies. The Volcanic Activity Index is MEDIUM.