8 Tungurahua, Ecuador (8)
Tungurahua had an especially active year, with some large explosive events that sent pyroclastic flows down the slopes of the volcano and ash across the region. The activity prompted repeated calls for evacuations around the volcano and significant damage to the crops that grow on the slopes of the Ecuadoran volcano.
Image: Tungurahua erupting in December 2012. IGEPN, M. Yepez.