The number of VLP seismic events (standard values 5-12) is medium, 9.7 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.81 bar (standard values <1 bar). The amplitude of puffing is medium, ~70 mbar.

Tiltmeters analysis does not show any significant deformation of the volcano edifice

Thermal activity of explosive events is low. The number of thermal transients in the NE sector of the crater (standard = 100) is low, 18. The amplitude of thermal transients is low, 1.78 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 12 m/s.

MODIS thermal anomalies are low: 8 MW (12:24 UTC yesterday).

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

SO₂ flux in the NE sector of the crater terrace is high, 239 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 LOW
• SO₂ flux HIGH
• CO₂ flux not available
• 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 HIGH degassing activity (puffing 70 mbar). The pressure of the explosions is MEDIUM (max acoustic pressure 0.81 bar). The number of thermal transients is LOW, with LOW thermal amplitudes and LOW pyroclast exit velocities. The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (9.7 events/hour). MODIS/VIIRS images show LOW thermal anomalies (max 8 MW). The SO2 flux measured at the NE crater sector is HIGH (239 t/d). No new data of CO2 flux are avaiable. The rockfall activity is MEDIUM (9 events detected in the last 24h) with MEDIUM seismic pseudo-volumes involved.The volcanic activity index is HIGH.