Photos from Germany
Germany has a large number of volcanoes - most of them extinct, but the Eifel volcanic field is still potentially active.

Krakatoa explodes
In the afternoon of 17 Oct, a particularly violent explosion occurred at Anak Krakatau, blasting away a portion of the southern crater rim. A similar event might have been the final trigger for the catastrophic landslide that let the cone collapse and cause a devastating tsunami on 22 Dec 2018.