Mount Sinabung on Sumatra island is seen from Karo unleashing gas and fine rock as it erupts again on October 31, 2016. 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 by Satar Ginting/AFP Photo)
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