The number of VLP seismic events (standard values 5-12) is medium, 9.6 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is high, 2.3 bar (standard values <1 bar). The amplitude of puffing is medium, ~74 mbar.

Tiltmeters analysis does not show any significant deformation of the volcano edifice

Thermal activity of explosive events is high. The number of thermal transients in the NE sector of the crater (standard = 100) is high, 428. The amplitude of thermal transients is high, 38 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is medium, 37 m/s.

MODIS thermal anomalies are medium: 48 MW (11:54 UTC yesterday).

Rockfall activity is high. The number of rockfalls is 11 per day.

SO₂ flux in the NE sector of the crater terrace is high, 240 t/d

CO₂ flux based on the C/S of 5.09 mesured at 23:20 UTC on 2024/08/13 is high, 1333 t/d

Indice di Attività Vulcanica: high

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

The volcanic activity is generally characterized by strombolian explosions, rich in scoria with ash emissions, located mainly at the NE crater sector and degassing (puffing/spattering) located at the NE crater sector. Spattering is characterized by HIGH values of pressure and this continuos activity is correlated with seismic tremor characterized from HIGH to VERY HIGH values. In the last 24h, the Stromboli volcano showed a HIGH degassing activity (puffing/spattering with values of about 74 mbar). The explosive activity is VERY HIGH (max acoustic pressure 2,3 bar). The number of explosions (thermal transients) are HIGH, with a HIGH thermal amplitude and MEDIUM exit velocity of pyroclasts. The volcanic tremor shows HIGH to VERY HIGH values. The number of VLP events showed MEDIUM values (9.6 events/hour). MODIS/VIIRS thermal data shows MODERATE values (max 48 MW), consistent with the observed activity SO2 flux shows HIGH values (last: 240 t/d recorded on the 15/08/2024), CO2 flux shows HIGH values (last: 1333 t/d based on C/S value of 5.09 recorded on the 13/08/2024). The rockfall activity is HIGH (11 events detected with LOW to MEDIUM pseudo-volumes associated). The volcanic activity index is HIGH.