An eruption occurred at 5:57 a.m. local time (21:57 UTC), which generated an ash column that rose to an altitude 500 meters into the sky.
On Sunday, two days later, a major blast took place sending an ash column as high as 50000 ft (15.24 km) into the sky.
The eruption has exposed 487.8K people to the hazard, the local officials said.
The 5,423 meter Mount Ili Lewotolokis one of three erupting in Indonesia, along with Merapi on Java island and Sinabung on Sumatra island.
Indonesia has almost 130 active volcanoes.