The number of VLP seismic events (standard values 5-12) is medium, 7 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: 0.3 MW (00:12 UTC yesterday).

Rockfall activity is high. The number of rockfalls is 17 per day.

SO₂ flux in the NE sector of the crater terrace is low, 40 t/d

CO₂ flux based on the C/S of 39.51 mesured at 05:25 UTC on 2025/03/11 is high, 2220 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 LOW
• CO₂ flux HIGH
• Rockfall activity HIGH

The volcanic activity is generally characterized by strombolian explosions and puffing located at NE crater sector. In the last 24h, the Stromboli volcano showed a MEDIUM degassing activity (puffing 40 mbar). The pressure of the explosions is MEDIUM (max acoustic pressure 1.1 bar). The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (7.0 events/hour). MODIS/VIIRS images show LOW thermal anomalies (< 1 MW). The SO2 flux measured at the NE crater sector is LOW (40 t/d), with an increase toward MEDIUM in the early measures of today. CO2 flux, retrieved by a C/S ratio of 39.51 measured at 05:25 of today, is HIGH. The rockfall activity is HIGH (17 events detected in the last 24h, with LOW seismic pseudo-volumes involved).The volcanic activity index is MEDIUM.