The number of VLP seismic events (standard values 5-12) is medium, 10.1 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is medium, 1 bar (standard values <1 bar). The amplitude of puffing is low, ~40 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: 3 MW (01:48 UTC yesterday).

Rockfall activity is high. The number of rockfalls is 24 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 76 t/d

CO₂ flux based on the C/S of 18.9 mesured at 03:20 UTC on 2025/06/08 is high, 1460 t/d

Indice di Attività Vulcanica: medium

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

In the last 24h, Stromboli volcano showed MEDIUM degassing activity (puffing/spattering with values of about 40 mbar), located at NE and SW sector, associated with a general MEDIUM explosive activity (<1 bar). Between the 20:00UTC and the 24:00UTC of yesterday, has been observed a slight increase in the infrasonic pressure of explosions, at the NE sector, with a single event at 23:20UTC that reach value of 2 bar (VERY HIGH). The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (10.1 events/hour). MODIS and VIIRS satellite images show LOW thermal anomalies (3 MW). SO2 flux is MEDIUM (76 t/d). The CO2 flux, retrieved by a C/S ratio of 18.9 measured at 03:20UTC of yesterday, is HIGH (1460 t/d). The rockfall activity is HIGH, with 24 events detected in the last 24 hours. The Volcanic Activity Index is MEDIUM.