The number of VLP seismic events (standard values 5-12) is high, 12.8 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is high, 1.63 bar (standard values <1 bar). The amplitude of puffing is high, ~55.1 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 medium: 40 MW (11:24 UTC yesterday).

Rockfall activity is high. The number of rockfalls is 14 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 104 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

In the last 24h, Stromboli volcano showed HIGH degassing activity (puffing/spattering values of about 55.1 mbar) located mainly in the SW sector, associated with HIGH explosive activity (max. acoustic pressure 1.63 bar), located mainly in the NE sector. The volcanic tremor has HIGH values. The number of VLP events is HIGH (12.8 events/hour). MODIS and VIIRS satellite images show MEDIUM thermal anomalies (40 MW). SO2 flux is MEDIUM (104 t/d). No new CO2 flux data are available. The number of rockfalls is HIGH, with 14 events detected in the past 24h. The volcanic activity index is MEDIUM.