Located at 3.17°N 98.392°E the volcano erupted suddenly and without warning. The Jakarta Post and Xinhua have photos of the eruption:
Mount Sinabung erupts: (Tribun Medan/Dedy Sinuhaji) Mount Sinabung in North Sumatra erupted on Sunday at 00.15 a.m. Antara news agency reported local villagers did not expect the eruption as the geophysics and meteorology agency just declared a normal status for the mountain. Villagers fled home to a safer location, but no police officers yet helped the evacuation process. On Saturday, the 2,400 meter-high mountain showed its volcanic activity by spewing black clouds. ===========================
Villagers ride a motorcycle while covering their mouths at the district of Tanah Karo outside the city of Medan, North Sumatra, as the Mount Sinabung volcano spews smoke in the background August 28, 2010. (Xinhua/Reuters Photo)
Spokesman of National Disaster Management Agency Priyadi Kardono said the eruption has not been predicted much earlier like other volcanoes and authorities must conduct a quick preparation for emergency work as mount Sinabung’s seismic activity has been monitored intensively only since Friday after it showed an increase in activity.
Over 10,000 people have been internally evacuated after the eruption, Secretary of the provincial administration Edy Sofyan told Xinhua by phone.
Priyadi said that aid from Jakarta will be sent within days.
Mount Sinabung, whose last eruption occurred 400 years ago, is classified at category “B” which means it is not necessary to be monitored intensively, but other volcanoes in category “A,” must be monitored frequently, head of National Volcanology Agency named only Surono told Xinhua over phone from the province.
The near equatorial location is in a position to have a lot of ash swept into the ITCZ and will bear watching.
h/t to WUWT reader Daniel H