After the volcanic eruption below the South Pacific Ocean floor, a tsunami alert was issued. People have already been told to stay at a safe distance from the coast.
The BBC reports that waves up to 3 meters high in the sea off the coast of Japan and 1.2 meters high in the south of the country have been warned.
Extreme levels of flood danger were announced in at least two places in the United States.
A tsunami alert was issued in the Pacific island nation of Tonga on Saturday (January 15) following a volcanic eruption.
Footage released through social media showed a church and several houses flooded after a volcanic eruption on the seabed.
The New Zealand national daily, the New Zealand Herald, reported that the country's volcanic mountains, Hunga Tonga and Hunga Hapai, became active on Thursday. The eruption has caused huge waves in the sea.
In addition, ash, gas and smoke from volcanic eruptions have risen up to 20 km above sea level. Volcanic ash has been falling like rain for two days in the capital Nuku'alofa.