The number of VLP seismic events (standard values 5-12) is high, 12.5 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is high. The acoustic pressure of explosions is very high, 2.43 bar (standard values <1 bar). The amplitude of puffing is medium, ~45.2 mbar.

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

Thermal activity of explosive events is medium. The number of thermal transients in the NE sector of the crater (standard = 100) is high, 886. The amplitude of thermal transients is not available. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 13 m/s.

MODIS thermal anomalies are low: 4 MW (19:50 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 10 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 75 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

In the last 24h, Stromboli volcano showed HIGH degassing activity (puffing/spattering values of about 45.2 mbar) located mainly in the SW sector, associated with HIGH explosive activity (max. acoustic pressure 2.43 bar), located mainly in the SW sector. The volcanic tremor has MEDIUM values. The number of VLP events is HIGH (12.5 events/hour). MODIS and VIIRS satellite images show LOW thermal anomalies (4 MW). SO2 flux is MEDIUM (75 t/d). No new CO2 flux data are available. The number of rockfalls is MEDIUM, with 10 events detected in the past 24h. The volcanic activity index is MEDIUM.