Japan's Meteorological Agency says the country will not be affected by tsunami tidal surges following a major volcanic eruption in Indonesia.
The agency made the announcement at 11:30 a.m. Tuesday.
Mount Ruang in North Sulawesi Province erupted early in the morning, sending plumes of ash to a height of about 19,000 meters.
A massive eruption can cause changes in atmospheric pressure and trigger tsunami tidal surges.
The agency has been checking the impact, but says it did not detect any major tidal changes at observation points in Japan and abroad.
The agency has been issuing tidal level information since a massive undersea eruption near Tonga in the South Pacific two years ago made sea levels surge around Japan.
The 725-meter-high Mount Ruang previously erupted on April 17, forcing about 800 people to flee to another island.