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 medium. The acoustic pressure of explosions is low, 0.53 bar (standard values <1 bar). The amplitude of puffing is low, ~46 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, 550. The amplitude of thermal transients is high, 50 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is high, 51 m/s.

MODIS thermal anomalies are low: 4 MW (00:54 UTC yesterday).

Rockfall activity is very high. The number of rockfalls is 27 per day.

SO₂ flux in the NE sector of the crater terrace is very high, 269 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

• Seismic (VLP) rate MEDIUM
• Seismic tremor HIGH
• Puffing LOW
• Acustic pression of explosions LOW
• Thermal activity HIGH
• SO₂ flux VERY HIGH
• CO₂ flux not available
• Rockfall activity VERY 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) located at the NE crater sector. When degassing increase to spattering, at the same time, seismic tremor increase to HIGH values and viceversa In the last 24h, the Stromboli volcano showed a MEDIUM degassing activity (puffing with values of about 47 mbar). The explosive activity is MEDIUM (max acoustic pressure 0.63 bar). The number of explosions (thermal transients) are HIGH, with a HIGH thermal amplitude and HIGH exit velocity of pyroclasts. The volcanic tremor shows MEDIUM values. The number of VLP events showed MEDIUM values (9.6 events/hour). MODIS/VIIRS thermal data shows LOW values (max 4 MW) SO2 flux shows VERY HIGH values (last: 267 t/d recorded on the 13/08/2024), CO2 flux shows non new data (last: 640 t/d based on C/S value of 8.55 recorded on the 10/08/2024). The rockfall activity is VERY HIGH (27 events detected with LOW to MEDIUM pseudo-volumes associated). The volcanic activity index is MEDIUM.