Bulletins | LGS

Bulletins

Bulletin n. 7545

29/10/2025 - 10:17

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, 0.18 bar (standard values <1 bar). The amplitude of puffing is low, ~28 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: 3.35 MW (01:06 UTC yesterday).

Rockfall activity: no rockfalls detected.

SO2 flux in the NE sector of the crater terrace is low, 47 t/d

CO2 flux based on the C/S of 3.42 mesured at 13:20 UTC on 2025/10/28 is medium, 401 t/d

Indice di Attività Vulcanica: medium

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

The volcanic activity is generally characterized by Strombolian explosions and degassing (puffing/spattering) mainly located at SW and NE crater sectors. In the last 24h, the volcano showed a MEDIUM degassing activity (puffing/spattering with values of about 28 mbar) at SW sector. The explosive activity shows MEDIUM values (<0.18 bar) mainly at the NE sector. The volcanic tremor shows MEDIUM values. The number of VLP events shows MEDIUM values (9.8 events/hour). MODIS/VIIRS thermal data show LOW thermal anomalies. SO2 shows LOW values (47 t/d), while CO2 values are LOW (401 t/d). The rockfall activity is LOW (no events detected in the last 24h). The volcanic activity index is MEDIUM.