When Calbuto erupted in 2015, it prompted the evacuation of roughly 4,000 citizens from nearby cities and villages in Chile.
The volcano overlooks the cities of Puerto Montt and Puerto Varas, which have a combined population of roughly 250,000 people. It had last erupted in 1972, so authorities were somewhat surprised by the outburst. Calbuco is a stratovolcano (also known as a composite volcano), and these are best known for having explosive eruptions.
Photos Credit : some to Jorge Nauto, others are Public Domain