Bulletins | LGS

Bulletins

Bulletin n. 7541

25/10/2025 - 11:52

The number of VLP seismic events (standard values 5-12) is low, 3 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.18 bar (standard values <1 bar). The amplitude of puffing is medium, ~52 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: 1.53 MW (02:00 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 1 per day.

SO2 flux in the NE sector of the crater terrace is low, 42 t/d

CO2 flux based on the C/S of 4.84 mesured at 07:20 UTC on 2025/10/25 is low, 215 t/d

Indice di Attività Vulcanica: medium

  • Seismic (VLP) rate LOW
  • Seismic tremor HIGH
  • Puffing MEDIUM
  • 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 MEDIUM degassing activity (puffing/spattering with values of about 52 mbar) at SW sector. The explosive activity shows LOW values (<0.2 bar). The volcanic tremor shows HIGH values. The number of VLP events shows LOW values (3 events/hour). However, adverse weather conditions may affect the accuracy of this estimate. MODIS/VIIRS thermal data show LOW thermal anomalies. SO2 shows LOW values (42 t/d), while CO2 values are LOW (215 t/d). The rockfall activity is LOW (1 event detected in the last 24h). The volcanic activity index is MEDIUM.