The number of VLP seismic events (standard values 5-12) is high, 16.5 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is medium, 0.95 bar (standard values <1 bar). The amplitude of puffing is medium, ~40 mbar.

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

Thermal activity of explosive events is medium. The number of thermal transients in the NE sector of the crater (standard = 100) is high, 519. The amplitude of thermal transients is low, 5.47 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 15 m/s.

MODIS thermal anomalies are medium: 61 MW (08:05 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 medium, 94 t/d

CO₂ flux based on the C/S of 9.93 mesured at 23:20 UTC on 2026/05/28 is high, 1670 t/d

Indice di Attività Vulcanica: high

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

In the last 24h, the volcanic activity is characterized by Strombolian explosions with MEDIUM acoustic pressures (max 0.95 bar), located at the NE crater sector. The degassing activity (puffing/spattering), located at the SW sector, shows MEDIUM values (average of 40 mbar). The volcanic tremor has MEDIUM values. The number of VLP events is HIGH (16.5 events/hour). MODIS and VIIRS satellite images show MEDIUM thermal anomalies (max 61 MW). SO2 flux shows MEDIUM values (94 t/d). CO2 flux, evaluated using the C/S ratio of 9.93, measured on 28/05/2026 at 23:20 UTC, is HIGH (1670 t/d). The number of rockfalls is HIGH (11 events detected in the last 24h, with LOW pseudo-volumes involved). The volcanic activity index is HIGH.