Jakarta, Sept. 21 -- Mount Lewotobi Laki-laki in Indonesia's East Nusa Tenggara (NTT) erupted multiple times from September 19-20, and Indonesian Energy and Mineral Resources Ministry's Geology Agency raised its alert level to the highest after the eruption.

According to Indonesia's Centre for Volcanology and Geological Hazard Mitigation (PVMBG), the 1,584m-high twin-peaked volcano on Flores Island launched into a series of eruptions on September 19 evening, with the largest sending volcanic material 6 km above its peak. Volcanic activities resumed on September 20 morning, with the agency recording several eruptions including one that sent an ash tower 2.5 km into the sky.

Head of Indonesia's Geology Agency Muhammad Wafid warned residen...