Mount Sinabung’s activity has increased since last year and the alert for the volcano in North Sumatra province has been placed at the second-highest level. No casualties were reported, but an official had earlier urged people to stay at least 3 km from the crater, Indonesia’s Volcanology and Geological Hazard Mitigation Centre said.

Standing at 2,460m tall, Sinabung was inactive for around 400 years before it erupted in 2010, killing two people.

More than a dozen people were killed and thousands were forced to flee when it erupted in 2014 and during a February 2018 eruption it released a plume of ash which blew away much of its summit.

Indonesia has nearly 130 active volcanoes, more than any other country. It is particularly prone to seismic activity due to its location on the “Ring of Fire,” an arc of volcanoes and fault lines encircling the Pacific Basin.

According to Independent