According to the country’s Meteorology, Climatology and Geophysics Agency (BMKG), the eruption occurred at 4:09 am (local time) but the exact height of ash columns is hardly able to be observed.
Heavy cloud hindered direct vision to the peak of the volcano when it erupted, it said.
The eruption was recorded by seismograph with maximum amplitude of 22 mm, lasted in three minutes and eight seconds, it added.
The agency issued the level III danger status of the volcano.
Indonesia's Centre of Volcanology and Geological Disaster Mitigation (PVMBG) urged locals, trekkers and tourists to stay away from red zone at present, which is 4 km from the volcano crater.
The PVMBG said the red zone areas could be expanded or reduced in the following days on the basis of results monitored by its observation outpost.
It also warned people residing near the rivers of being cautious of potential threats as the lava and volcanic materials may flow into rivers.-VNA