The Hunga-Tonga-Hunga-Ha’apai volcano erupted on Friday, sending a plume of ash 20 kilometers (12.4 miles) into the air, according to CNN Radio New Zealand (RNZ) affiliate.
A second eruption struck at 5:26 p.m. local time on Saturday, RNZ reported.
The satellite image shows a huge ash cloud and shock waves spreading from the eruption. Waves from the eruption swept across the coastline of Tonga’s capital, Nuku’alofa, spilling onto coastal roads and inundating properties, according to RNZ.
The volcano is located about 30 kilometers (18.6 miles) southeast of the island of Fonuafo’ou in Tonga, according to RNZ.
In addition to the warming from the tsunami, the Tonga Meteorological Service issued advisories of heavy rain, flash flooding and high winds over land and coastal waters.
The neighboring island of Fiji has also issued a public advisory asking people living in low-lying coastal areas to “get to safety in anticipation of strong currents and dangerous waves”.
A previous tsunami warning issued for American Samoa has since been cancelled, according to the NWS Pacific Tsunami Warning Center.
The volcano had been active since December 20, but was declared inactive on January 11, according to RNZ.