The Hunga-Tonga-Hunga-Ha’apai volcano first erupted on Friday, sending an ash cloud 20 kilometers (12.4 miles) into the air, according to CNN Radio New Zealand (RNZ).
The second eruption hit Saturday at 17:26 local time, RNZ said.
Satellite images show a massive ash cloud and shock waves propagating from the eruption. According to the RNZ eruption, waves crossed the shores of Tonga’s capital, Nuku’alofa, flowing onto coastal roads and flooding land.
The Australian Meteorological Office said it recorded a tsunami 1.2 meters (about 4 feet) near Nuku’alofa on Saturday at 5.30pm local time.
According to the RNZ, the volcano is located about 30 kilometers (18.6 miles) southeast of the island of Fonuafo’ou on Tonza.
In addition to the tsunami warning, Tonga’s meteorological services issued warnings of heavy rain, flash floods and strong winds in land and coastal waters.
The nearby island of Fiji has also issued a public recommendation calling on people living in low-lying coastal areas to “move to safety in anticipation of strong currents and dangerous waves.”
According to the Samoa Meteorological Service, a tsunami warning applies to all of Samoa’s coastal waters. No evacuation is required, but members of the public are advised to stay away from the beaches, the agency said.
The tsunami alert was also issued for coastal areas on the north and east coasts of New Zealand’s North Island and the Chatham Islands, where “strong and unusual currents and unpredictable shock waves on the coast are expected,” the New Zealand National Crisis Management Agency said. .
The New Zealand Meteorological Service said its weather stations across the country recorded a “pressure wave” on Saturday night as a result of the eruption.
An earlier tsunami warning issued for American Samoa has since been revoked, according to the NWS Pacific Tsunami Warning Center.
According to the Pacific Tsunami Warning Center, there is no tsunami threat to Guam and the Commonwealth of the Northern Mariana Islands from a “distant eruption.”
The volcano has been active since December 20, but according to the RNZ, it was declared dormant on January 11.