The number of VLP seismic events (standard values 5-12) is medium, 10.3 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.37 bar (standard values <1 bar). The amplitude of puffing is medium, ~53.7 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 low. The number of rockfalls is 1 per day.

SO₂ flux in the NE sector of the crater terrace is high, 194 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: high

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

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 53.7 mbar). The pressure of the explosions is MEDIUM (max acoustic pressure 0.37 bar). The number of thermal transients detected from thermal camera is not avaiable. The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (10.3 events/hour). MODIS/VIIRS images show NO thermal anomalies. The SO2 flux measured at the NE crater sector is HIGH (194 t/d). The CO2 flux values are not available. The rockfall activity is LOW (1 event detected in the last 24h), with LOW seismic pseudo-volumes involved. The volcanic activity index is HIGH. NB: VLP rate, infrasonic activity and seismic tremor could be underestimated due to technical problems of some seismic stations.