Bulletins | LGS

Bulletins

Bulletin n. 6892

02/01/2024 - 12:58

The number of VLP seismic events (standard values 5-12) is medium, 7.4 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.16 bar (standard values <1 bar). The amplitude of puffing is low, ~10 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 6 per day.

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

CO2 flux based on the C/S of 17.52 mesured at 12:20 UTC on 2024/01/02 is medium, 702 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 MEDIUM

The volcanic activity is characterized by strombolian explosions located at NE and C crater sectors and degassing activity (puffing) located mainly at C sector. In the last 24h the explosive activity produced MEDIUM acoustic pressures (max. 0.16 bar) and MEDIUM degassing activity (puffing 10 mbar). The number of VLP events shows MEDIUM values (7.6 events/hour). Thermal activity was not evaluated due to adverse weather conditions. The volcanic tremor is MEDIUM. MODIS/VIIRS images showed no thermal anomalies. SO2 flux shows LOW values (45 t/d). CO2 flux, estimated from a C/S ratio of 17.52, is MEDIUM (702 t/d). Rockfall activity is MEDIUM with 6 events detected in the last 24h. The volcanic activity index is MEDIUM.