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 high. The acoustic pressure of explosions is high, 2.11 bar (standard values <1 bar). The amplitude of puffing is medium, ~55.1 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: 3.99 MW (00:42 UTC yesterday).

Rockfall activity is medium. The number of rockfalls is 10 per day.

SO₂ flux in the NE sector of the crater terrace is high, 248 t/d

CO₂ flux based on the C/S of 16.82 mesured at 05:25 UTC on 2024/09/20 is very high, 2774 t/d

Indice di Attività Vulcanica: high

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

The volcanic activity is generally characterized by strombolian explosions and puffing mainly located at NE crater sector. In the last 24h, the Stromboli volcano shows a HIGH degassing activity (puffing 55.1 mbar). The pressure of the explosions is VERY HIGH (max acoustic pressure 2.1 bar). The number of thermal transients detected from thermal camera is not available. The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (9.6 events/hour). MODIS/VIIRS images show LOW thermal anomalies (3.99 MW). The SO2 flux measured at the NE crater sector is HIGH (248 t/d). The CO2 flux values base on a C/S ratio of 16.82 measured on 20/09/2024 at 05.25 UTC is VERY HIGH (2774 t/d). The rockfall activity is MEDIUM (10 events detected in the last 24h, with LOW and MEDIUM seismic pseudo-volumes involved). The volcanic activity index is HIGH.