Bulletins | LGS

Bulletins

Bulletin n. 7193

31/10/2024 - 08:38

The number of VLP seismic events (standard values 5-12) is medium, 11.7 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is medium, 1.5 bar (standard values <1 bar). The amplitude of puffing is medium, ~90 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 low: 4 MW (01:12 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 2 per day.

SO2 flux in the NE sector of the crater terrace is medium, 122 t/d

CO2 flux based on the C/S of 17.4 mesured at 17:20 UTC on 2024/10/30 is very high, 2464 t/d

Indice di Attività Vulcanica: high

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

The volcanic activity is generally characterized by strombolian explosions and degassing (puffing/spattering) both located at the NE crater sector and by few explosions at SW crater. Explotions are characterized by MEDIUM values of pressure. In the last 24h, the Stromboli volcano showed a HIGH degassing activity (puffing/spattering with values of about 90 mbar). The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (11.7 events/hour). SO2 flux shows MEDIUM value (last: 122 t/d ).The CO2 flux is VERY HIGH (last: 2464 ton/day based on C/S 17.4 recorded on 30 October at 17:20 UTC). MODIS/VIIRS thermal data shows LOW thermal anomalies (max 4 MW). The rockfall activity is LOW (2 events detected). The volcanic activity index is HIGH.