The number of VLP seismic events (standard values 5-12) is high, 14.1 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is high, 1 bar (standard values <1 bar). The amplitude of puffing is high, ~73 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: 6 MW (03:10 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 3 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 139 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: high

• 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 LOW

The volcanic activity is generally characterized by strombolian explosions and degassing (puffing/spattering) located mainly at SW crater sectors. In the last 24h, the Stromboli volcano showed a HIGH degassing activity (puffing/spattering with values of about 70 mbar). The explosive activity is MEDIUM (max acoustic pressure 1.2 bar). The volcanic tremor shows HIGH values with an increasing trend in thge last 24 hours. The number of VLP events shows HIGH values (14.1 events/hour). MODIS/VIIRS thermal data shows LOW thermal anomalies. SO2 flux shows MEDIUM values (last: 139 t/d), with an increasing trend in the last 24 hours. CO2 flux no data are available in la st 24 hours. The rockfall activity is LOW (n.3 event detected with LOW pseudo-volumes associated). The volcanic activity index is HIGH.