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

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.2 bar (standard values <1 bar). The amplitude of puffing is low, ~40 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: 1 MW (00:30 UTC yesterday).

Rockfall activity is medium. The number of rockfalls is 9 per day.

SO₂ flux in the NE sector of the crater terrace is low, 65 t/d

CO₂ flux based on the C/S of 26.71 mesured at 03:20 UTC on 2025/07/26 is high, 1755 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 HIGH
• Rockfall activity MEDIUM

The volcanic activity is characterized by Strombolian explosions located at the NE and SW crater sectors. In the last 24 hrs, Stromboli volcano showed a MEDIUM degassing activity (puffing/spattering with values of about 40 mbar) located at SW crater. The explosive activity is MEDIUM max acoustic pressure 0.28 bar). The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (9.9 events/hour). MODIS/VIIRS thermal data show LOW thermal anomalies (1 MW) in the last 24 hrs. The SO2 flux shows LOW values (last: 65 t/d). The CO2 flux in the last 24h, retrieved by C/S of 26.71 recorded at 03:20 of yesterday, shows VERY HIGH level (1755 t/d). The rockfall activity is MEDIUM (9 events detected in the last 24h having LOW seismic energies). The volcanic activity index is MEDIUM.