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

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.52 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, 54. The amplitude of thermal transients is low, 2 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is medium, 35 m/s.

MODIS thermal anomalies are low: 5 MW (01:00 UTC yesterday).

Rockfall activity: no rockfalls detected.

SO₂ flux in the NE sector of the crater terrace is low, 56 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

The volcanic activity is generally characterized by strombolian explosions, with ash emissions, located at the NE crater sector and puffing localized at the C and SW crater sectors. In the last 24h, the Stromboli volcano showed a HIGH degassing activity (puffing with values of about 70 mbar). The explosive activity is MEDIUM (max acoustic pressure 0.52 bar). The number of explosions (thermal transients) are LOW, with a LOW thermal amplitude and MEDIUM exit velocity of pyroclasts. The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (10.3 events/hour). MODIS/VIIRS images showed LOW thermal anomalies. The SO2 flux measure is LOW (56 t/d). The rockfall activity is LOW (zero events detected). The volcanic activity index is MEDIUM. N.B. The infrasonic activity could be underestimated due to adverse weather conditions (strong wind).