The number of VLP seismic events (standard values 5-12) is medium, 10.8 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.6 bar (standard values <1 bar). The amplitude of puffing is medium, ~63.5 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 high. The number of rockfalls is 20 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 80 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: high

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

The volcanic activity is generally characterized by degassing activity and explosions located at the new NE crater sector. In the last 24h, the Stromboli volcano showed MEDIUM values of infrasonic amplitude of the explosions. The degassing acticity, in the last 24 hours, oscillates between MEDIUM and HIGH values coherently with volcanic tremor amplitude. The number of VLP events showed MEDIUM values (10.8 events/hour with low amplitude). SO2 flux shows a decresing up to MEDIUM values (last:80 t/d). The rockfall activity is HIGH (29 events detected with LOW pseudo-volumes associated). The volcanic activity index is HIGH.