The number of VLP seismic events (standard values 5-12) is medium, 9.6 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is medium, 0.6 bar (standard values <1 bar). The amplitude of puffing is high, ~65 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: 3 MW (19:20 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, 45 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

In the last 24h, Stromboli volcano showed MEDIUM to HIGH degassing activity (puffing/spattering values of about 60 mbar) located mainly in the SW sector, associated with MEDIUM explosive activity (max. acoustic pressure 0.6 bar), located mainly in the NE sector. The volcanic tremor has HIGH values. The number of VLP events is MEDIUM (9.6 events/hour). MODIS and VIIRS satellite images show LOW thermal anomalies (3 MW). SO2 flux is LOW (45 t/d). No new CO2 flux data are available. The number of rockfalls is MEDIUM, with 9 events detected in the past 24h, with LOW events amplitude. The volcanic activity index is MEDIUM.