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 medium. The acoustic pressure of explosions is low, 0.2 bar (standard values <1 bar). The amplitude of puffing is medium, ~60 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 are low: 2 MW (00:42 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 3 per day.

SO₂ flux in the NE sector of the crater terrace is low, 52 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 NOT AVAILABLE
• SO₂ flux LOW
• CO₂ flux not available
• Rockfall activity LOW

In the last 24h, Stromboli volcano showed a degassing activity (puffing/spattering with values of about 60 mbar) located at SW sector, associated with MEDIUM values of infrasonic pressure at both crater sectors of NE and SW (max. acoustic pressure 0.2 bar). The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (9.7 events/hour). MODIS and VIIRS satellite images show LOW thermal anomalies (2 MW). SO2 flux is LOW (52 t/d). No new CO2 flux measures are available in the last 24h. The rockfall activity, retrieved by seismic signal related to rolling material along the Sciara del Fuoco, are LOW (2 evts.). The Volcanic Activity Index is MEDIUM.