Indonesia, the world's most active volcanic region, lies on the Pacific "Ring of Fire" where tectonic plates collide, causing frequent volcanic and seismic activities.
Evacuation of 140,000 people
Another Indonesian volcano, Mount Agung on the tourist paradise of Bali, has also been rumbling since September, forcing the evacuation of 140,000 people living nearby and prompting the closure of the island's international airport.
Sinabung erupted in May
In May last year seven people were killed when Sinabung erupted, while a February 2014 eruption left 16 people dead.
Shower of volcanic ashes
Thousands were affected by the shower of volcanic ashes on the island of Sumatra but no one was severely injured because the dangerous zone was vacated earlier.
The eruption sent volcanic ash down Sinabung's slopes, destroying crops and causing misery to hundreds of farmers.
Biggest eruption of the year
Indonesia's Mount Sinabung volcano experienced its biggest eruption of the year this week, spewing clouds of gas and showering ash into the sky, a local official said Friday.