The number of VLP seismic events (standard values 5-12) is medium, 11.8 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.24 bar (standard values <1 bar). The amplitude of puffing is low, ~20 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 low, 26. The amplitude of thermal transients is low, 0.68 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 19 m/s.

MODIS thermal anomalies: no thermal anomalies.

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

SO₂ flux in the NE sector of the crater terrace is low, 46 t/d

CO₂ flux based on the C/S of 16.08 mesured at 08:20 UTC on 2025/03/25 is medium, 879 t/d

Indice di Attività Vulcanica: medium

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

The volcanic activity is characterized by strombolian explosions located at NE crater and degassing activity (puffing) located at SW sector. In the last 24h Stromboli volcano shows explosive activity with general MEDIUM acoustic pressure (max 0.24 bar) and MEDIUM degassing activity (puffing 20 mbar). The number of VLP events shows MEDIUM values (11.8 events/hour). Thermal activity is characterized by LOW number of transients having LOW thermal amplitude and LOW exit velocity of pyroclasts. The volcanic tremor is MEDIUM. MODIS/VIIRS images show no thermal anomalies. SO2 flux is LOW (46 t/d). CO2 flux values, based on a C/S ratio of 16.08 measured on 25/03/2024 at 8.20 UTC, is MEDIUM (879 t/d). Rockfall activity is characterized by LOW number of events (2 event detected in the last 24h with LOW pseudo-volume associated). The volcanic activity index is MEDIUM.