Bulletins | LGS

Bulletins

Bulletin n. 7373

09/05/2025 - 08:00

The number of VLP seismic events (standard values 5-12) is medium, 10.3 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is high. The acoustic pressure of explosions is high, 2.28 bar (standard values <1 bar). The amplitude of puffing is low, ~30 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 medium. The number of rockfalls is 22 per day.

SO2 flux in the NE sector of the crater terrace is low, 58 t/d

CO2 flux based on the C/S of 16.22 mesured at 19:20 UTC on 2025/05/08 is medium, 728 t/d

Indice di Attività Vulcanica: medium

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

The volcanic activity is characterized by Strombolian explosions located at NE and C/SW crater sector and degassing (puffing/spattering) located prevalently at C/SW crater sectors. In the last 24h, degassing activity (puffing/spattering) showed MEDIUM values (~30 mbar). The explosive activity is VERY HIGH (max acoustic pressure 2.28 bar). The volcanic tremor shows MEDIUM values, with associated a MEDIUM number of VLP events (10.3 events/hour). MODIS/VIIRS thermal data shows no thermal anomalies. SO2 flux shows LOW values (last: 58 t/d ), CO2 flux is MEDIUM (728 t/d). The number of rockfall activity is HIGH (22 events detected in the last 24 h), with associated LOW pseudo-volumes). The volcanic activity index is MEDIUM.