Henge, Tonga and Honga Hapai volcanoes erupted for the first time on Friday, sending a plume of ash 20 kilometers (12.4 miles) into the air, according to CNN affiliate Radio New Zealand (RNZ).
A second eruption struck Saturday at 5:26 p.m. local time, RNZ reports.
The satellite image shows a huge ash cloud and shock waves spreading from the eruption. Waves of volcanic eruptions crossed the coastline of Tonga’s capital, Nuku’alofa, cascading onto coastal roads and flooding features, according to RNZ.
The volcano is located about 30 kilometers (18.6 miles) southeast of Funuafu Island in Tonga, according to RNZ.
In addition to the warming as a result of the tsunami, Tonga’s meteorological services have issued warnings of heavy rain, flash floods and strong winds in land and coastal waters.
The nearby island of Fiji has also issued a general advice asking people living in low-lying coastal areas to “go to safety in anticipation of strong currents and dangerous waves”.
A previous tsunami warning issued for American Samoa has since been rescinded, according to the NWS Pacific Tsunami Warning Center.
The volcano was active as of December 20, but was declared dormant on January 11, according to RNZ.