The number of VLP seismic events (standard values 5-12) is medium, 6.9 events/hour.

The amplitude of seismic tremor is very high.

The infrasonic activity is very high. The acoustic pressure of explosions is medium, 1.25 bar (standard values <1 bar). The amplitude of puffing is high, ~176.1 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 medium: 14.38 MW (01:48 UTC yesterday).

Rockfall activity is high. The number of rockfalls is 33 per day.

SO₂ flux in the NE sector of the crater terrace is high, 185 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: high

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

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 VERY HIGH degassing activity (puffing 176.1 mbar). The pressure of the explosions is HIGH (max acoustic pressure 1.25 bar). The number of thermal transients detected from thermal camera is not avaiable. The volcanic tremor shows VERY HIGH values. The number of VLP events is MEDIUM (6.9 events/hour). MODIS/VIIRS images show MEDIUM thermal anomalies (max 14.38 MW). The SO2 flux measured at the NE crater sector is HIGH (185 t/d). The CO2 flux values are not available. The rockfall activity is HIGH (33 event detected in the last 24h), with LOW to VERY HIGH seismic pseudo-volumes involved. The volcanic activity index is HIGH. NB: VLP rate and infrasonic activity could be underestimated due to bad weather conditions