JMA reported that increased eruptive activity at Asosan that began on 28 July paused at 1110 on 16 August.
An eruptive event was recorded at 1627 on 18 August; elevated eruptive activity continued at least through 19 August.
The Tokyo VAAC reported that the eruptive event on 18 August produced an ash plume that rose to 2.1 km (7,000 ft) a.s.l.
Ash plumes rose to 1.5-2.1 km (5,000-7,000 ft) a.s.l.
and drifted N and NW during 19-20 August.
The Alert Level remained at 2 (on a scale of 1-5).
Source: Japan Meteorological Agency (JMA)