Mount Sinabung on Sumatra island is seen from Karo unleashing gas and fine rock as it erupts again on October 31, 2016. Mount Sinabung is one of the 129 active volcanos in Indonesia situated on a quake-prone zone of "the pacific Ring of Fire." Sinabung roared back to life in 2010 for the first time in 400 years and after another period of inactivity it erupted once more in 2013, and has remained highly active since. (Photo/Agencies)
