This timed-exposure photo taken on December 28, 2017 shows Moung Sinabung volcano spewing lava that lights up the night sky in Karo, North Sumatra. Mount Sinabung roared back to life in 2010 for the first time in 400 years, after another period of inactivity it erupted once more in 2013, and has remained highly active since. (Photo by Lana Priatna/AFP Photo)
