The number of VLP seismic events (standard values 5-12) is medium, 8.9 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.49 bar (standard values <1 bar). The amplitude of puffing is low, ~40 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, 12. The amplitude of thermal transients is low, 0.25 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 12 m/s.

MODIS thermal anomalies are low: 0.22 MW (00:30 UTC yesterday).

Rockfall activity is medium. The number of rockfalls is 5 per day.

SO₂ flux in the NE sector of the crater terrace is low, 60 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

In the last 24h, the Stromboli volcano showed a MEDIUM degassing activity (puffing 40 mbar) and MEDIUM pressure of the explosions (up to 0.49 bar) located at the NE and SW crater sectors. The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (8.9 events/hour). MODIS/VIIRS images show LOW thermal anomalies (max 0.22 MW). The SO2 flux measured at the NE crater sector shows LOW values (60 t/d). No new data of CO2 flux are avaiable. The rockfall activity is MEDIUM (5 events in the last 24h having LOW seismic pseudo-volumes). The volcanic activity index is MEDIUM.