The number of VLP seismic events (standard values 5-12) is medium, 7.8 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.7 bar (standard values <1 bar). The amplitude of puffing is low, ~30 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: no rockfalls detected.

SO₂ flux in the NE sector of the crater terrace is low, 41 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 NOT AVAILABLE
• SO₂ flux LOW
• CO₂ flux not available
• Rockfall activity LOW

In the last 24h, Stromboli volcano showed a MEDIUM degassing activity (puffing 30 mbar) and MEDIUM pressure of the explosions (up to 0.70 bar) located mainly at the NE crater sector. The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (7.8 events/hour). MODIS/VIIRS images show no thermal anomalies. The SO2 flux measured at the NE crater sector shows LOW values (41 t/d). No measurements for CO2 flux were available in the last 24 hrs. The rockfall activity is LOW (no events detected in the last 24h). The volcanic activity index is MEDIUM.