Kyodo News is reporting that there seems to have been an underwater volcanic eruption around Minami IwoJima.

The coast guard confirmed a change in the color of the sea water and volcanic smoke in waters 60 kilometers south of Iwojima Island. The Japanese Meteorological Agency believes it is likely that the volcano called Fukutoku Okanoba has erupted, agency officials said.

A fishing boat from Kochi Prefecture spotted the unusual sea color and smoke, and informed the coast guard around 10 a.m. Monday, they said.