Bulletin n. 7543
27/10/2025 - 09:53
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 low, 0.93 bar (standard values <1 bar). The amplitude of puffing is high, ~102 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: no thermal anomalies.
Rockfall activity is low. The number of rockfalls is 3 per day.
SO2 flux in the NE sector of the crater terrace is low, 50 t/d
CO2 flux based on the C/S of 6.61 mesured at 23:20 UTC on 2025/10/26 is low, 378 t/d
Indice di Attività Vulcanica: medium
- Seismic (VLP) rate MEDIUM
- Seismic tremor HIGH
- Puffing HIGH
- Acustic pression of explosions LOW
- Thermal activity NOT AVAILABLE
- SO2 flux LOW
- CO2 flux LOW
- Rockfall activity LOW
The volcanic activity is generally characterized by Strombolian explosions and degassing (puffing/spattering) mainly located at SW crater sector. In the last 24h, the volcano showed a VERY HIGH degassing activity (puffing/spattering with values of about 102 mbar) at SW sector. The explosive activity shows MEDIUM values (<0.9 bar). The volcanic tremor shows HIGH values. The number of VLP events shows MEDIUM values (9.6 events/hour). MODIS/VIIRS thermal data show no thermal anomalies. SO2 shows LOW values (50 t/d), while CO2 values are LOW (378 t/d). The rockfall activity is LOW (3 events detected in the last 24h). The volcanic activity index is MEDIUM.