The number of VLP seismic events (standard values 5-12) is medium, 9.8 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.75 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: 2 MW (20:00 UTC yesterday).

Rockfall activity is medium. The number of rockfalls is 12 per day.

SO₂ flux in the NE sector of the crater terrace is not available

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: high

• Seismic (VLP) rate MEDIUM
• Seismic tremor MEDIUM
• Puffing LOW
• Acustic pression of explosions LOW
• Thermal activity NOT AVAILABLE
• SO₂ flux not available
• CO₂ flux not available
• Rockfall activity MEDIUM

The volcanic activity is generally characterized by strombolian explosions with MEDIUM pressure (max 0.75 bar) and mainly located at the NE crater sector. Degassing (puffing/spattering), located at the NE crater sector, is characterized by MEDIUM pressure values (about 30 mbar). The seismic tremor shows MEDIUM values. The volcano edifice does not show any significant deformation. The number of VLP events is MEDIUM (9.8 events/hour). The number of explosions detected by thermal camera is not available for technical reasons. MODIS/VIIRS thermal data show LOW thermal anomalies (2 MW), measured the 4st September at 20:00 UTC. SO2 flux was not evaluated. CO2 was not evaluated. The rockfall activity is MEDIUM (12 events detected with LOW pseudo-volumes associated). The volcanic activity index is HIGH.