Bulletins | LGS

Bulletins

Bulletin n. 7125

23/08/2024 - 08:39

The number of VLP seismic events (standard values 5-12) is medium, 9.1 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.93 bar (standard values <1 bar). The amplitude of puffing is medium, ~91 mbar.

Tiltmeters analysis does not show any significant deformation of the volcano edifice

Thermal activity of explosive events is high. The number of thermal transients in the NE sector of the crater (standard = 100) is high, 481. The amplitude of thermal transients is high, 60 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 16 m/s.

MODIS thermal anomalies are medium: 17 MW (02:15 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 4 per day.

SO2 flux in the NE sector of the crater terrace is high, 178 t/d

CO2 flux based on the C/S of 10.4 mesured at 13:20 UTC on 2024/08/22 is high, 1889 t/d

Indice di Attività Vulcanica: high

  • Seismic (VLP) rate MEDIUM
  • Seismic tremor HIGH
  • Puffing MEDIUM
  • Acustic pression of explosions LOW
  • Thermal activity HIGH
  • SO2 flux HIGH
  • CO2 flux HIGH
  • Rockfall activity LOW

The volcanic activity is generally characterized by strombolian explosions with MEDIUM pressure (max 0.93 bar) and located at the NE crater sector. Degassing (puffing/spattering), located at the NE crater sector, is characterized by HIGH pressure values (about 91 mbar). The seismic tremor is HIGH showing sporadic fluctuations towards VERY HIGH values. The number of VLP events is MEDIUM (9.41 events/hour). The analysis does not show any significant deformation of the volcanic edifice. The number of explosions (thermal transients) is HIGH, with a HIGH thermal amplitude and LOW exit velocity of pyroclasts. MODIS/VIIRS thermal data shows MEDIUM thermal anomaly. SO2 flux shows MEDIUM values (last: 98 t/d recorded on the 23/08/2024). CO2 flux shows HIGH values (last: 1889 t/d based on C/S value of 10.4 recorded on the 22/08/2024). The rockfall activity is LOW (4 events detected with LOW pseudo-volumes associated). The volcanic activity index is HIGH.