JMA reported that the number of daily explosions at Suwanosejima's Ontake Crater began increasing on 2 August and remained elevated through 7 August; their frequency began decreasing on 8 August.
About 11 explosions were recorded during 8-15 August.
Eruption plumes rose as high as 2 km above the crater rim and large ballistics were ejected as far as 800 m from the crater.
Incandescence from the crater was often visible at night.
The Alert Level remained at 2 and the public was warned to stay 1 km away from the crater.
Source: Japan Meteorological Agency (JMA)