Likely activity on Mount Michael

In the satellite images from the 11th and the 12th December 2014 on the EOSDIS website, I noticed what looked like a possible eruption which took place. In the image from 11th December, it looks what appears to be a dubious looking plume originating from the summit area of Mount Michael on Saunders Island drifting in a southwesterly direction. In that image it wasn't easy to confirm whether that was an eruption plume or not. In the image from 12th December, a dark strip appears on the southwest flank of Mount Michael giving a strong indication that an eruption had took place. In my personal opinion, it looks volcanic so it could either be ash deposits, or a lava flow, or both.

What appears to be most likely a plume originating from Mount Michael and drifting southwest in this image from 11th December 2014. SOURCE: NASA.

A dark strip on the southwest flank of Mount Michael is a strong indication that a recent eruption took place in this image from 12th December 2014. SOURCE: NASA.

Possible gas plume on Mount Michael

LANDSAT 8 satellite imagery from 6th December 2014 shows what appears to be a gas or water vapour plume originating from the summit area of Mount Michael on Saunders Island. Because the west flank is covered in mist it is not easy to tell for sure whether it really is an emission or if it is just a wind current. Thermal imagery could not pick up any thermal anomalies from the same area so I am under the opinion that it is either water vapour related, or that it could be weather related.

Water vapour? wind current? SOURCE: Landsat 8/USGS/NASA.