The number of VLP seismic events (standard values 5-12) is medium, 9.6 events/hour.

The amplitude of seismic tremor is medium.

The infrasonic activity is medium. The acoustic pressure of explosions is low, 0.14 bar (standard values <1 bar). The amplitude of puffing is low, ~44 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, 25. The amplitude of thermal transients is low, 16.9 ºF. Exit velocity of pyroclasts, estimated through thermal camera analysis, is low, 11 m/s.

MODIS thermal anomalies are medium: 28 MW (13:20 UTC yesterday).

Rockfall activity is high. The number of rockfalls is 13 per day.

SO₂ flux in the NE sector of the crater terrace is medium, 78 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 MEDIUM
• CO₂ flux not available
• Rockfall activity HIGH

In the last 24h, Stromboli volcano showed a MEDIUM degassing activity (puffing/spattering with values of about 44 mbar) located at SW sector, associated to explosions with MEDIUM acoustic pressures (max. 0.14 bar). The volcanic tremor shows MEDIUM values. The number of VLP events is MEDIUM (9.6 events/hour). MODIS and VIIRS satellite images show MEDIUM thermal anomalies (max 28 MW). SO2 flux is MEDIUM (78 t/d). No new data of CO2 flux are avaiable. The rockfall activity is HIGH, with 13 evens detected in the past 24 hours having LOW seismic energies. The Volcanic Activity Index is MEDIUM.