A tidal surge caused by a volcanic eruption in Tonga has already hit Eden today, 16 January 2022, and is expected to continue to affect the NSW South Coast this morning.
Boaters, fishers and swimmers are being urged to stay out of the water while a marine warning remains in place.
The marine warning for Australia’s east coast was generated by an undersea volcano erupting near Tonga. The Bureau of Meteorology said the Hunga Tonga-Hung Ha’apai volcano erupted at 3:10 pm AEDT on Saturday, generating a tsunami.
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Emergency authorities have advised people to get out of the water and move away from the immediate water’s edge of harbours, coastal estuaries, rock platforms and beaches until the threat passes.
The tsunami is likely to manifest as a tidal surge by the time it reaches the South Coast and is expected to pass this morning.
We are continuing to monitor the #tsunami event after a volcanic eruption near #Tonga. Land threat warning still current for Lord Howe & Norfolk Is, marine threat warning still current for parts of Qld, NSW, Vic & Tas. Will be in place for several hours. https://t.co/4vdBUsHiKf pic.twitter.com/wOxBaMZK4y
— Bureau of Meteorology, Australia (@BOM_au) January 15, 2022
Tsunami waves are more powerful than the same size beach waves. There will be many waves and the first wave may not be the largest.
At 4:54 am on Sunday, the Joint Australian Tsunami Warning Centre said a marine warning remained in place for NSW, covering all coastal areas.
It said there was the possibility of dangerous rips, waves and strong ocean currents, and some “localised overflow” onto the immediate foreshore.
Footage from Tonga shows waves rolling through coastal homes as a fresh tsunami warnings were issued on Saturday afternoon, prompting residents of the Pacific island nation to flee to higher ground.