At least 800 people in North Sulawesi province, Indonesia have been evacuated after multiple eruptions of Mount Ruang volcano.
National news agency Antara (Indonesia) reported that Mount Ruang erupted at around 7:19 p.m. local time on April 17. Authorities have not yet recorded any deaths or injuries.
On April 18, Indonesian officials said the volcano on Ruang Island, about 100km from the capital Manado of North Sulawesi province, has erupted more than three times since the first time on April 16.
Reuters news agency quoted Ms. Heruningtyas Desi Purnamasari, an expert at the Indonesian Center for Volcanology and Geological Hazard Mitigation (PVMBG), as saying that the cause of the Ruang volcano eruption was due to recent earthquakes on the island.
Tremors on the Earth's surface caused the mountain to send out "hot clouds" as high as 1.8km into the sky before erupting lava.
“We have evacuated the entire island as more eruptions are expected, and all activities within 4km of the crater have been banned,” Ms Heruningtyas added.
According to Dr. Tracy KP Gregg - head of the geology department at the University of Buffalo (USA), Indonesia is one of the places with the most active volcanoes in the world.
Dr Gregg said the last major eruption of Mount Ruang occurred in 2002, when a column of lava and ash shot up to 43km into the sky.
Indonesia is known as the "land of thousands of islands" because it has thousands of islands forming an archipelago, and is also the largest archipelagic country in the world.
The country lies on the Pacific Ring of Fire, where seismic activity frequently occurs under the surface of the Pacific Ocean, creating earthquakes and volcanoes.
According to the New York Times, Ruang is a stratovolcano, also known as a composite volcano. The mountain has a conical structure, formed over many years from many different layers of lava.