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

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.6 bar (standard values <1 bar). The amplitude of puffing is high, ~100 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 medium: 15 MW (02:15 UTC yesterday).

Rockfall activity is medium. The number of rockfalls is 23 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 85 t/d

CO₂ flux based on the C/S of 12.11 mesured at 07:20 UTC on 2024/12/04 is medium, 1254 t/d

Indice di Attività Vulcanica: high

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

The volcanic activity is primarily characterized by Strombolian explosions and degassing (puffing/spattering) occurring at the NE crater sector. Explosions are associated with MEDIUM pressure values (maximum 0.83 bar). Over the past 24 hours, Stromboli volcano exhibited VERY HIGH degassing activity (puffing/spattering with pressure values of ~100 mbar). The volcanic tremor shows HIGH values, with fluctuations up to VERY HIGH. The frequency of VLP events is MEDIUM (11.8 events per hour). SO2 flux is MEDIUM (85 t/d). CO2 flux is MEDIUM (daily mean of 1254 t/d, based on a C/S ratio of 12.11 measured on 04/12/2024 at 07:20 UTC). MODIS and VIIRS satellite images show MEDIUM thermal anomalies (~15 MW). Rockfall activity is MEDIUM, with 23 events detected in the past 24 hours. The Volcanic Activity Index is HIGH.