The number of VLP seismic events (standard values 5-12) is high, 14.6 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is very high, 2 bar (standard values <1 bar). The amplitude of puffing is high, ~77 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 medium, 88. The amplitude of thermal transients is low, 4 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is medium, 20 m/s.

MODIS thermal anomalies: no thermal anomalies.

Rockfall activity is medium. The number of rockfalls is 8 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 91 t/d

CO₂ flux based on the C/S of 6.65 mesured at 21:20 UTC on 2026/07/01 is medium, 937 t/d

Indice di Attività Vulcanica: medium

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

The volcanic activity of Stromboli volcano shwed HIGH degassing activity (puffing/spattering values of about 80 mbar) located mainly in the NE sector, associated with HIGH to VERY HIGH explosive activity (max. acoustic pressure 2.3 bar), located in the NE sector. The volcanic tremor show HIGH values. The number of VLP events is HIGH (14.6 events/hour). No thermal anomalies was detected by MODIS and VIIRS satellite images. SO2 flux is MEDIUM (91 t/d). CO2 flux retrieved by a C/S ratio of 6.65 acquired at 21:20 UTC of yesterday is MEDIUM (937 t/d). The number of rockfalls is MEDIUM, with 8 events detected in the last 24h. The volcanic activity index is MEDIUM.