The number of VLP seismic events (standard values 5-12) is high, 13.1 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is high, 1.2 bar (standard values <1 bar). The amplitude of puffing is medium, ~30 mbar.

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

Thermal activity of explosive events is medium. The number of thermal transients in the NE sector of the crater (standard = 100) is high, 774. The amplitude of thermal transients is low, 5 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 15 m/s.

MODIS thermal anomalies are medium: 18 MW (08:25 UTC yesterday).

Rockfall activity is medium. The number of rockfalls is 10 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 102 t/d

CO₂ flux based on the C/S of 4.8 mesured at 13:20 UTC on 2026/05/07 is medium, 521 t/d

Indice di Attività Vulcanica: high

• Seismic (VLP) rate HIGH
• Seismic tremor HIGH
• Puffing MEDIUM
• Acustic pression of explosions HIGH
• Thermal activity MEDIUM
• SO₂ flux MEDIUM
• CO₂ flux MEDIUM
• Rockfall activity MEDIUM

In the last 24h, Stromboli volcano showed MEDIUM degassing activity (puffing/spattering values of about 30 mbar) located mainly in the SW sector, associated with MEDIUM to HIGH explosive activity (max. acoustic pressure 1.2 bar), located mainly in the NE sector. The volcanic tremor has HIGH values. The number of VLP events is HIGH (13.1 events/hour). MODIS and VIIRS satellite images show MEDIUM thermal anomalies (18 MW). SO2 flux is MEDIUM (102 t/d) with a slight decrease in the last 24h. CO2 flux data is MEDIUM (521 t/d) with a C/S ratio of 4.8. The number of rockfalls is MEDIUM, with 10 events detected in the past 24h. The volcanic activity index is HIGH.