The number of VLP seismic events (standard values 5-12) is medium, 9.8 events/hour.

The amplitude of seismic tremor is high.

The infrasonic activity is high. The acoustic pressure of explosions is medium, 1.1 bar (standard values <1 bar). The amplitude of puffing is high, ~136 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: 1.35 MW (00:48 UTC yesterday).

Rockfall activity is low. The number of rockfalls is 1 per day.

SO₂ flux in the NE sector of the crater terrace is low, 55 t/d

CO₂ flux based on the C/S is not available

Indice di Attività Vulcanica: high

• Seismic (VLP) rate MEDIUM
• Seismic tremor HIGH
• Puffing HIGH
• Acustic pression of explosions MEDIUM
• Thermal activity NOT AVAILABLE
• SO₂ flux LOW
• CO₂ flux not available
• 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 137 mbar). The volcanic tremor shows HIGH values. The number of VLP events is MEDIUM (9.8 events/hour). SO2 flux shows LOW value (last: 55 t/d ) MODIS/VIIRS thermal data shows LOW thermal anomalies (max 1 MW). No new data of CO2 flux are available. The rockfall activity is LOW (1 events detected). The volcanic activity index is HIGH.