Bulletins | LGS

Bulletins

Bulletin n. 7166

03/10/2024 - 08:32

The number of VLP seismic events (standard values 5-12) is medium, 8.7 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.81 bar (standard values <1 bar). The amplitude of puffing is medium, ~60.5 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 medium: 67 MW (11:36 UTC yesterday).

Rockfall activity is medium. The number of rockfalls is 11 per day.

SO2 flux in the NE sector of the crater terrace is medium, 153 t/d

CO2 flux based on the C/S of 11.97 mesured at 15:20 UTC on 2024/10/02 is high, 1708 t/d

Indice di Attività Vulcanica: high

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

In the last 24h, the volcanic activity is characterised by Strombolian explosions and puffing, mainly located at the NE crater sector. Degassing activity shows HIGH values (puffing 61 mbar) and the pressure of the explosions is MEDIUM (max acoustic pressure 0.81 bar). The thermal activity cannot be evaluated due to technical problems. The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (8.7 events/hour). MODIS and VIIRS satellite images show MEDIUM thermal anomalies (67 MW). The SO2 flux is MEDIUM (153 t/d). The CO2 flux, based on the C/S ratio of 11.97 measured on 02/10/2024 at 15:20 UTC, is HIGH (1708 t/d). The rockfall activity is MEDIUM (11 events detected in the last 24h, with LOW to MEDIUM seismic pseudo-volumes involved). The volcanic activity index is HIGH.