JMA reported that during 11-18 January incandescence from Minamidake Crater (at Aira Caldera?s Sakurajima volcano) was often visible nightly.
The sulfur dioxide emission rate remained high, reaching 2,100 tons per day on 13 January.
Five explosions and three eruptive events were recorded, producing eruption plumes that rose 1.3-2 km above the crater rim and ejecting bombs 500-900 m away from the crater.
The Alert Level remained at 3 (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)