The Volcanology and Geological Disaster Mitigation Center (PVMBG) has maintained Mount Lokon's status at siaga (Alert Level 3) despite an eruption on Saturday.
"We hope residents won't enter the 2.5-kilometer radius from the volcano's Tompaluan Crater that we designated as a danger zone," said an official from the Lokon and Mahawu volcano observation post in Kakaskasen, Manado, on Sunday as quoted by Antara news agency.
The official, who requested anonymity, said that after Saturday's eruption, volcanic tremors were still being recorded and there was a possibility of another eruption.
"We hope everyone adheres to our recommendation on the volcano's danger zone because more eruptions could be forthcoming and threaten the safety of residents if they continue with their activities within the radius deemed dangerous," said the official.
Lokon, an active volcano in Tomohon, North Sulawesi, erupted 11:48 p.m. local time Saturday, spewing volcanic ash around 1,500 meters high, which spread in a northern and eastern direction away from the volcano.
Increases in Mt Lokon's volcanic activity had been recorded since Friday before it erupted the following day. The volcano, which is one of the most active in North Sulawesi, last erupted on May 20.