JMA reported that incandescence from Minamidake crater (at Aira Caldera?s Sakurajima volcano) was occasionally visible at night during 22-29 April. Three events and one explosion during 22-26 April generated plumes that rose as high as 1.4 km above the crater rim. A small event was recorded on 27 April. The Alert Level remained at 3 (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)