Indonesia's Center for Volcanology and Geological Hazard Mitigation recorded at least three eruptions since Friday afternoon, with the maximum height of the eruption column reaching 1,200 meters (3,900 feet)
An international airport in Manado city, less than 100 kilometers (60 miles) from the erupting Mount Ruang, is still temporarily closed as volcanic ash was spewed into the air
Satellite imagery from the Meteorology, Climatology and Geophysics Agency shows the ash has spread to the west, northwest, northeast and southeast, covering Manado and North Minahasa, according to a statement from Indonesia's Transportation Ministry
"We are still monitoring developments in the eruption of Mount Ruang and coordinating with relevant stakeholders, to anticipate the necessary actions to ensure flight safety, security and comfort," said Ambar Suryoko, head of the regional airport authority
More than 11,000 people were told to leave their homes that were located in the affected area. A joint team from the local authorities combed the villages surrounding the volcano and evacuated residents to safer areas by boat
Officials worry that part of the volcano could collapse into the sea and cause a tsunami, as happened in an eruption there in 1871
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