Bulletins | LGS

Bulletins

Bulletin n. 7538

22/10/2025 - 09:49

The number of VLP seismic events (standard values 5-12) is medium, 8.4 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.3 bar (standard values <1 bar). The amplitude of puffing is medium, ~50 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: no rockfalls detected.

SO2 flux in the NE sector of the crater terrace is low, 45 t/d

CO2 flux based on the C/S of 8.3 mesured at 07:20 UTC on 2025/10/22 is low, 311 t/d

Indice di Attività Vulcanica: medium

  • Seismic (VLP) rate MEDIUM
  • 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 located at the NE and SW crater sectors and a degassing (puffing/spattering) mainly located at SW crater sectors. In the last 24h, the volcano showed a HIGH degassing activity (puffing/spattering with values of about 50 mbar) at SW sector. The explosive activity shows LOW values (<0.5 bar). The volcanic tremor shows HIGH values. The number of VLP events shows MEDIUM values (8.4 events/hour). MODIS/VIIRS thermal data shows no thermal anomalies. SO2 shows LOW values (45 t/d), CO2 values are LOW (311 t/d). The rockfall activity is LOW (0 event). The volcanic activity index is MEDIUM.