Dark patch near the summit of Michael Volcano

In the satellite pic of Saunders Island from the 25th December 2015, a new dark patch is present at the "Old Crater" located immediately southeast of the summit crater on Michael Volcano. This suggests that some new activity had taken place on that part of the volcano. Judging from the colour of the dark patch through the mist, this suggests that (in my opinion) the activity may have been effusive or simply just new fumaroles. As the eastern half of the island is covered in clouds this cannot be clearly determined what took place there.

What appears to be some form of new activity just to the southeast of the summit crater. SOURCE: Landsat 8/USGS/NASA.