The number of VLP seismic events (standard values 5-12) is medium, 6.4 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.8 bar (standard values <1 bar). The amplitude of puffing is low, ~37 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: 1 MW (00:55 UTC yesterday).

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

SO₂ flux in the NE sector of the crater terrace is medium, 73 t/d

CO₂ flux based on the C/S of 6 mesured at 09:20 UTC on 2025/06/28 is medium, 446 t/d

Indice di Attività Vulcanica: medium

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

The volcanic activity is characterized by Strombolian explosions and degassing (puffing/spattering) located at the NE crater sector. In the last 24h, the Stromboli volcano showed a MEDIUM degassing activity (puffing/spattering with values of about 30 mbar). The explosive activity is MEDIUM (max acoustic pressure 0.5 bar). The volcanic tremor shows MEDIUM values. The number of VLP events shows MEDIUM values (6.9 events/hour). MODIS/VIIRS thermal data shows LOW thermal anomalies (max 1 MW). SO2 flux shows MEDIUM values (last: 107 t/d recorded63), CO2 flux is MEDIUM. The rockfall activity is MEDIUM (9 events detected with LOW pseudo-volumes associated). The volcanic activity index is MEDIUM.