After avalanches and associated pyroclastic flows, and a strong outgassing, the Bezymianny erupted on December 20 at 3:55 UTC.
At first, the ash plume rose to 8 km, then was reported at a height of 15 km asl. before drifting northeast of the volcano for 85 km.
The plume collapsed in part on itself, generating pyroclastic flows that enveloped the volcano.
The aviation code has changed to Red
Source: KVERT & VAAC Tokyo
KB GS RAS video
Two collapses have been reported at the Halema'uma'u lava lake by the USGS; the first on December 5 at 4:40 (right on the photo), the second, December 7 at 18:56 (left on the photo taken December 12).
The part of the wall that collapsed generated a strong spattering at the impact location, without causing any explosions. The bustle then swept over the lava lake, breaking the crust patches into small pieces.
These collapses are normal during periods of low levels of the lava lake.
Episode 61g remains active; a breakout on the Upper Pulama pali made a surface flow in a kipuka, and fired the little existing vegetation. Surface flows remain active on the coastal plain, while remaining approximately 2,000 meters from the evacuation route. Entry into the sea at Kamokuna is inactive.
Source: HVO - USGS
Kilauea - Pu'u O'o - the active lava field at 12.012.2017 - doc HVO - This map shows recent changes to Kīlauea's East Rift Area lava flow field. The area of the active flow field is shown in pink, while widening and advancement of the active as of December 12 is shown in red. Older Pu'u'Ō'ō lava flows (1983-2016) are shown in gray. The yellow line is the trace of the active lava tubes; No matter how hard it is, but it is still quite hot to the thermal camera. The Kamokuna ocean entry is inactive.