Mt. Sinabung is a pleistocene-to-holocene stratovolcano located in North Sumatra, Indonesia. It's OK if you aren't sure what exactly that means, because the word that is important in the previous sentence is volcano, mainly because of what they are known to do: erupt, leading to massive damage.
Erupt is just what Mt. Sinabung did early Sunday, forcing thousands to flee the area. The evacuation affected 11 villages in Karo regency in North Sumatra. Those that were not removed from the area by military or disaster authorities fled of their own initiative, as people are apt to do when threatened with lava and volcanic ash.
Mt. Sinabung last erupted in 2010, which was the first major recorded activity from the volcano in nearly 410 years. The sudden uptake in activity has lead to it being reclassified to a level 3 from a level 2 by Indonesia's Energy and Mineral Resources Ministry. The ministry has also said that a future eruption is possibly and has warned those living near the volcano to remain vigilant.
Those who live in close proximity to the volcano have not been allowed to return home as of yet, and authorities report that around 1,500 individuals are currently in temporary housing until their homes are safe again.[Image via The Cosmos News]