The number of VLP seismic events (standard values 5-12) is medium, 10.2 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.12 bar (standard values <1 bar). The amplitude of puffing is low, ~0.2 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, 17. The amplitude of thermal transients is medium, 23 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 5 m/s.

MODIS thermal anomalies: no thermal anomalies.

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

SO₂ flux in the NE sector of the crater terrace is low, 65 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 LOW
• Acustic pression of explosions LOW
• Thermal activity LOW
• SO₂ flux LOW
• CO₂ flux not available
• Rockfall activity LOW

The volcanic activity is characterized by a few and low strombolian explosions located at NE crater and degassing activity (puffing) located at SW sector. In the last 24h Stromboli volcano shows explosive activity with general MEDIUM acoustic pressure (max 0.12 bar) and MEDIUM degassing activity (puffing 20 mbar). The number of VLP events shows MEDIUM values (10.2 events/hour). Thermal activity is characterized by LOW number of transients having LOW thermal amplitude and MEDIUM exit velocity of pyroclasts. The volcanic tremor is MEDIUM. MODIS/VIIRS images show no new thermal anomalies. SO2 flux is LOW (65 t/d). No new CO2 flux measurements are available in the last 24h. Rockfall activity show LOW values, with 9 rockfalls events associated to LOW seismic energy. The volcanic activity index is MEDIUM.