Bali Volcano: Indonesia, the world's most volcanic region

Indonesia has more active volcanoes than any other country on Earth.

The Southeast Asian archipelago of 17-thousand islands is part of the Pacific ring of fire, a vast zone of instability where the collision of tectonic plates causes frequent quakes and major volcanic activity.

Mount Agung last erupted in 1963, killing nearly 16-hundred people and sending ash as far as the capital Jakarta.