The number of VLP seismic events (standard values 5-12) is high, 12.4 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is medium, 0.9 bar (standard values <1 bar). The amplitude of puffing is high, ~70 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, 940. The amplitude of thermal transients is low, 5 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 12 m/s.

MODIS thermal anomalies are medium: 81 MW (14:05 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 4 per day.

SO₂ flux in the NE sector of the crater terrace is low, 57 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 MEDIUM
• Thermal activity MEDIUM
• SO₂ flux LOW
• CO₂ flux not available
• Rockfall activity LOW

In the last 24h, Stromboli volcano showed HIGH degassing activity (puffing/spattering values of about 70 mbar) located mainly in the SW sector, associated with MEDIUM explosive activity (max. acoustic pressure 0.94 bar), located mainly in the NE sector. The volcanic tremor has HIGH values. The number of VLP events is HIGH (12.4 events/hour). MODIS and VIIRS satellite images show MEDIUM thermal anomalies (81 MW). SO2 flux is LOW (57 t/d). Nonew measure of CO2 flux is available in the last 24h. The number of rockfalls is LOW, with 4 events detected in the past 24h. The volcanic activity index is HIGH.