Bulletins | LGS

Bulletins

Bulletin n. 7167

04/10/2024 - 09:04

The number of VLP seismic events (standard values 5-12) is medium, 7.5 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.9 bar (standard values <1 bar). The amplitude of puffing is high, ~100 mbar.

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

Thermal activity of explosive events is low. The number of thermal transients in the NE sector of the crater (standard = 100) is low, 7. 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 high. The number of rockfalls is 18 per day.

SO2 flux in the NE sector of the crater terrace is medium, 75 t/d

CO2 flux based on the C/S of 4.03 mesured at 07:20 UTC on 2024/07/04 is high, 2106 t/d

Indice di Attività Vulcanica: high

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

In the last 24h, the volcanic activity is characterised by Strombolian explosions and puffing, mainly located at the NE crater sector; with a one-hour long phase of spattering starting about the 03:00 UTC of today. Degassing activity shows HIGH to VERY HIGH values (puffing about 100 mbar) and the pressure of the explosions is MEDIUM (max acoustic pressure 0.9 bar). The thermal activity shows LOW number of explosions. The volcanic tremor shows HIGH values, with VERY HIGH values measured on short-live period (03:00-04:30 UTC of today). The number of VLP events is MEDIUM (7.5 events/hour). MODIS and VIIRS satellite images doesn't show thermal anomalies. The SO2 flux is MEDIUM (75 t/d), with early measures shows HIGH values (up to 221 t/d). The CO2 flux, based on the C/S ratio of 4.03 measured on 04/10/2024 at 07:20 UTC, is HIGH (2100 t/d). The rockfall activity is HIGH (18 events detected in the last 24h, with LOW to MEDIUM seismic pseudo-volumes involved). The volcanic activity index is HIGH.