The number of VLP seismic events (standard values 5-12) is medium, 10.9 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.67 bar (standard values <1 bar). The amplitude of puffing is low, ~30 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: no thermal anomalies.

Rockfall activity is medium. The number of rockfalls is 9 per day.

SO₂ flux in the NE sector of the crater terrace is high, 197 t/d

CO₂ flux based on the C/S of 11.46 mesured at 19:20 UTC on 2024/09/22 is high, 1952 t/d

Indice di Attività Vulcanica: high

• Seismic (VLP) rate MEDIUM
• Seismic tremor MEDIUM
• Puffing LOW
• Acustic pression of explosions LOW
• Thermal activity NOT AVAILABLE
• SO₂ flux HIGH
• CO₂ flux 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 MEDIUM degassing activity (puffing 30 mbar). The pressure of the explosions is MEDIUM (max acoustic pressure 0.7 bar). The thermal activity cannot be evaluated due to technical problems. The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (10.9 events/hour). MODIS/VIIRS images show no thermal anomalies. The SO2 flux measured at the NE crater sector is HIGH (197 t/d). The CO2 flux, based on the C/S ratio of 11.46 measured on 22/09/2024 at 19.20 UTC, is HIGH (1952 t/d). The rockfall activity is MEDIUM (9 events detected in the last 24h, with LOW and MEDIUM seismic pseudo-volumes involved). The volcanic activity index is HIGH.