An Indonesian volcano shot a towering cloud of black ash high into the air on Tuesday, dusting villages 15 miles (25 kilometers) away in its most powerful eruption since awakening last week from four centuries of dormancy.
Some witnesses at the foot of Mount Sinabung reported seeing an orange glow — presumably magma — in cracks along the volcano’s slopes for the first time.
“There was a huge, thunderous sound. It sounded like hundreds of bombs going off at one,” said Ita Sitepu, 29, who was among thousands of people staying in crowded emergency shelters well away from the base. “Then everything starting shaking. I’ve never experienced anything like it.”
Mount Sinabung’s first eruption last week caught many scientists off guard.
With more than 129 active volcanoes to watch in this vast archipelago, local vulcanologists had failed to monitor the long-quiet mountain for rising magma, slight uplifts in land and other signs of seismic activity.
Indonesia is a seismically charged region because of its location on the so-called “Ring of Fire” — a series of fault lines stretching from the Western Hemisphere through Japan and Southeast Asia.
There are fears that current activity could foreshadow a much more destructive explosion in the coming weeks or months, though it is possible, too, that Singabung will go back to sleep after letting off steam.
More than 30,000 people living along the volcano’s fertile slopes have been relocated to cramped refugee camps, mosques and churches in nearby villages.
But some have insisted on returning to the danger zone to check on their homes and their dust-covered crops.
The government sent dozens of trucks to the mountain to help carry them back before Tuesday’s eruption, which sent ash and debris shooting three miles (5,000 meters) into the air, said Surono, who heads the nation’s volcano alert center.
“It was really terrifying,” said Anissa Siregar, 30, as she and her two children arrived at one of the makeshift camps, adding that the mountain shook violently for at least three minutes. “It just keeps getting worse.”
Local media said ash had reached as far as Berastagi, a district 15 miles (25 kilometers) from the base of the mountain.