A plume originating from Mount Curry on Zavodovski Island is drifting then dispersing to the south-southwest.
© Terra/MODIS/NASA.A plume originating from Mount Curry on Zavodovski Island is drifting then dispersing to the south-southwest.
On 17th December 2016, two plumes appear in satellite images. One originating from Zavodovski Island, and the other from Saunders Island.

In the image of Zavodovski Island, a white plume originating from the summit crater of Mount Curry is seen drifting in a south-southwesterly direction before dispersing. It's more likely to be a gas plume although I wouldn't rule out the possibility of some slight ash content.

In the image of Saunders Island, a greyish plume originating from the summit crater of Mount Michael is seen drifting towards the northeast. A thermal anomaly was also detected on the summit area of Mount Michael. This indicates that it's likely to be an eruption occurring on Mount Michael Volcano.

What is likely to be an ash plume from Mount Michael on Saunders Island.
© Aqua/MODIS/NASA.What is likely to be an ash plume from Mount Michael on Saunders Island.