The number of VLP seismic events (standard values 5-12) is medium, 6.1 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is low. The acoustic pressure of explosions is low, 0.06 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 low. The number of thermal transients in the NE sector of the crater (standard = 100) is low, 0. The amplitude of thermal transients is low, 0 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 0 m/s.

MODIS thermal anomalies: no thermal anomalies.

Rockfall activity is high. The number of rockfalls is 61 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 130 t/d

CO₂ flux based on the C/S of 5.74 mesured at 03:20 UTC on 2024/07/25 is medium, 980 t/d

Indice di Attività Vulcanica: very high

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

The volcanic activity is generally characterized by feeble degassing activity and few explosions with low pressure located at the new NE crater sector. In the last 24h, the Stromboli volcano showed a MEDIUM degassing activity (about 30 mbar). The explosive activity is LOW (few explosion with max acoustic pressure 0.06 bar). No thermal transients (number of explosions) recorded. The volcanic tremor shows MEDIUM values. The number of VLP events showed MEDIUM values (6.1 events/hour). MODIS/VIIRS images showed NO thermal anomalies. SO2 flux shows MEDIUM values (last: 130 t/d recorded on the 26/07/2024), CO2 flux shows MEDIUM values (last: 980 t/d based on C/S value of 5.74 recorded on the 25/07/2024). The rockfall activity is VERY HIGH (61 events detected with LOW pseudo-volumes associated). The volcanic activity index is VERY HIGH.