The number of VLP seismic events (standard values 5-12) is medium, 11.8 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is medium, 0.5 bar (standard values <1 bar). The amplitude of puffing is medium, ~41 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 (01:54 UTC yesterday).

Rockfall activity is high. The number of rockfalls is 20 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 92 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

In the last 24h, Stromboli volcano showed MEDIUM degassing activity (puffing/spattering values of about 40 mbar) located mainly in the SW sector, associated with up to MEDIUM explosive activity (max. acoustic pressure 0.6 bar), mainly located at the NE sector. The volcanic tremor has MEDIUM values. The number of VLP events is MEDIUM (11.8 events/hour),with an increase in the last 24h. MODIS and VIIRS satellite images detect LOW thermal anomalies (6 MW). SO2 flux show an increase towards MEDIUM values (92 t/d). No new measures of CO2 flux is available in the last 24h. The number of rockfalls is HIGH, with 20 events detected in the last 24h, with LOW events amplitude. The volcanic activity index is MEDIUM.