The photo is showing the moment of Mount Sinabung Eruption. This mountain actually is a volcano category B (not dangerous and not active), and she has slept for many years so people who lived around her didn't feel worry about. Suddenly, in the year 2010 the mountain exploded and people were shocked and government didn't prepare much as any other volcano. Then, she continues producing smoke, volcanic ash, and sometimes big explotion from 2011 until now.