The number of VLP seismic events (standard values 5-12) is medium, 6.6 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is medium, 1 bar (standard values <1 bar). The amplitude of puffing is medium, ~80 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 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: 1 MW (00:42 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 2 per day.

SO₂ flux in the NE sector of the crater terrace is low, 44 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

In the last 24h, Stromboli volcano showed MEDIUM to HIGH degassing activity (puffing/spattering with values up to 80 mbar), associated with a MEDIUM to HIGH explosive activity (max. acoustic pressure 1.3 bar) mainly located at the NE crater sector. The volcanic tremor shows oscillation from MEDIUM to HIGH values. The number of VLP events is stable to MEDIUM values (6.6 events/hour). MODIS and VIIRS satellite images showed LOW thermal anomalies (1 MW). SO2 flux is LOW (44 t/d). No new measures in C/S and CO2 flux are available in the last 24h. The events of rockfall on the Sciara del Fuoco detected by seismic signals are LOW (2 events). The Volcanic Activity Index is MEDIUM.