Update ETNA, December 4, 2015 16:00 UTC
The second episode of paroxysm from the Voragine crater in less than 36 hours peaked 08 h 00 at 09:00 UTC (local time = -1), with high lava fountains and an eruption column that has reached the height of at least 7 km above the summit of the volcano in about 10-15 minutes after the beginning of the paroxysm phase. The photo on the left, by Boris Behncke (INGV–Osservatorio Etneo) shows the eruption column from Misterbianco, on the south side at 8:38.
After 9:00, the explosive activity has gradually declined to sporadic ash emissions in the afternoon of 4 December 2015. The paroxysm was accompanied by frequent emissions of gray ash – brown in the new pit crater that is recently opened on top of the eastern flank of the cone of the New Southeast Crater (NCSE). These emissions were continuing while this update is published.
There remains a strong volcanic tremor amplitude, which corresponds with the paroxysm of the morning, which reached a higher peak than that associated with the frenzy of the night. In the dark of night, we observe sporadic strombolian explosions from Voragine and from the pit crater,on the upper side Eastern NCSE.
The coarse pyroclastic material was deposited on the upper West side of the volcano, above 2000 m, while ash fall occurred in the eastern district of Giarre – Zafferana.
December 05 , 2015. Etna, Sicily :
Source : INGV / B Behncke
Photos : Gio Giusa .