The number of VLP seismic events (standard values 5-12) is medium, 7.9 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, ~30 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 (01:06 UTC yesterday).

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

SO₂ flux in the NE sector of the crater terrace is medium, 95 t/d

CO₂ flux based on the C/S of 14.73 mesured at 21:20 UTC on 2025/04/07 is high, 1428 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 LOW

In the last 24h, Stromboli volcano showed a MEDIUM degassing activity (puffing about 30 mbar) and MEDIUM pressure of the explosions (up to 1 bar) located mainly at the NE crater sector. The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (7.9 events/hour). MODIS/VIIRS images show LOW thermal anomalies. The SO2 flux measured at the NE crater sector shows MEDIUM values (95 t/d). CO2 flux, based on C/S value of 14.73 recorded at 21:20UTC of yesterday, is HIGH (1428 t/d). The rockfall activity is LOW (2 events detected in the last 24h with LOW associated pseudo-volumes). The volcanic activity index is MEDIUM.