The number of VLP seismic events (standard values 5-12) is medium, 11.1 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is medium, 1.45 bar (standard values <1 bar). The amplitude of puffing is low, ~34.4 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 23 per day.

SO₂ flux in the NE sector of the crater terrace is not available

CO₂ flux based on the C/S of 10.06 mesured at 07:20 UTC on 2024/09/24 is very high, 4972 t/d

Indice di Attività Vulcanica: high

• Seismic (VLP) rate MEDIUM
• Seismic tremor HIGH
• Puffing LOW
• Acustic pression of explosions MEDIUM
• Thermal activity NOT AVAILABLE
• SO₂ flux not available
• 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 MEDIUM degassing activity (puffing 34 mbar). The pressure of the explosions is MEDIUM (max acoustic pressure 1.45 bar). The thermal activity cannot be evaluated due to technical problems. The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (11.1 events/hour). MODIS/VIIRS images show no thermal anomalies. The CO2 flux, based on the C/S ratio of 10.06 measured on 24/09/2024 at 07.20 UTC, is VERY HIGH (4972 t/d). The rockfall activity is MEDIUM (23 events detected in the last 24h, with LOW seismic pseudo-volumes involved). The volcanic activity index is HIGH.