At 21:00 UTC on May 1 (06:00 LT on May 2), JMA reported a powerful eruption as explosive activity continued from the active crater.

The dense dark ash plume reached around 2 743 m (9 000 feet) a.s.l., dispersing northward. Blocks were emitted as far as 900 m (2 952 feet) away.

At 22:04 UTC on May 7 (07:04 LT on May 8), the volcano spewed a dense, dark ash plume up to 2 000 m (6 561 feet) above the summit.

The following day, at 20:32 UTC on May 8 (05:32 LT on May 9) it ejected ash plumes up to 4 200 m (13 780 feet) a.s.l. Blocks were ejected as far as 1 000 m (3 280 feet) away.