White plumes from Kuchinoerabujima rose 600 m above the crater rim during 14-17 January.
Minor eruptive activity from 1659 on 17 January through 1030 on 20 January generated grayish-white plumes that rose 300 m.
Sulfur dioxide emissions were high at 800 and 1,600 tons per day on 15 and 16 January, respectively.
The Alert Level remained at 3 (the middle level on a scale of 1-5).
Source: Japan Meteorological Agency (JMA)