Mount Aso, Japan's largest active volcano, erupted Saturday morning and sent an ash cloud nearly 7 miles into the sky, the Japan Meteorological Agency reports.
Four nearby municipalities suffered brief power outages. Some flights were delayed, but air travel was otherwise unaffected.
The Japan Meteorological Agency reported that no one was injured.
WATCH| Raw video shows the eruption of the volcano and nearby areas gathering ash from the eruption.
Mount Aso is in south Japan and experienced an eruption with pyroclastic flow in September last year. Three tourists were killed on Mount Aso during a 1979 eruption.
A government official told a reporter from The Japan Times that the volcano was unstable and in danger of erupting again.
The Associated Press Contributed to this report.