The number of VLP seismic events (standard values 5-12) is medium, 9.12 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is high. The acoustic pressure of explosions is low, 0.35 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: no thermal anomalies.

Rockfall activity is medium. The number of rockfalls is 3 per day.

SO₂ flux in the NE sector of the crater terrace is not available

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: medium

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

In the last 24h, Stromboli volcano showed a HIGH degassing activity (puffing/spattering with values of about 90 mbar), associated with a MEDIUM explosive activity (max acoustic pressure 0.35 bar) mainly located at the NE crater sector. The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (9.12 events/hour). MODIS/VIIRS thermal data don't show thermal anomalies. SO2 flux and CO2 flux are not evaluated. The rockfall activity is MEDIUM (3 events detected in the last 24h, with MEDIUM seismic energies). The volcanic activity index is MEDIUM.