The number of VLP seismic events (standard values 5-12) is high, 17 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is high. The acoustic pressure of explosions is high, 1.5 bar (standard values <1 bar). The amplitude of puffing is high, ~51.7 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, 576. The amplitude of thermal transients is low, 4 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 17 m/s.

MODIS thermal anomalies are low: 6 MW (19:35 UTC yesterday).

Rockfall activity is medium. The number of rockfalls is 7 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 77 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 HIGH
• Acustic pression of explosions HIGH
• Thermal activity MEDIUM
• SO₂ flux MEDIUM
• CO₂ flux not available
• Rockfall activity MEDIUM

The volcanic activity of Stromboli volcano showed HIGH degassing activity (puffing/spattering values of about 52 mbar) located mainly in the NE sector, associated with HIGH explosive activity (max. acoustic pressure 1.5 bar), located in the NE sector. The volcanic tremor shows MEDIUM values. The number of VLP events is HIGH (17.0 events/hour). Thermal anomalies detected by MODIS and VIIRS satellite images are LOW (6 MW). SO2 flux is MEDIUM (77 t/d). CO2 flux is not available. The number of rockfalls is MEDIUM, with 7 events detected in the last 24h. The volcanic activity index is MEDIUM.