Japanese broadcaster TBS showed elementary school students wearing helmets and
masks today on the way to their school at the foot of the Shinmoedake volcano. Residents also described hearing rumbles from the volcano and ash fell in at least four cities and towns in Miyazaki prefecture.
The volcano on the border of Kagoshima and Miyazaki prefectures started erupting yesterday for the first time in six years.
An ash plume rose 1,700 meters (5,600 feet) today from the crater, the Japan Meteorological Agency said.
Pyroclastic flow, which is an emission of hot gases and volcanic matter at a high speed, is possible within kilometers of the crater. Emissions of ash and volcanic rocks were forecast tomorrow for a wider area, but the locations at risk would depend on wind conditions and altitude.
The seismically active area around the Pacific, known as the 'Ring of Fire' includes active volcanoes in Japan as well as two causing mass evacuations in Indonesia and Vanuatu in recent weeks.