18 January 2022

Volcanic eruption sparks tsunami warning for the South Coast

| Kim Treasure
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Swimmers are being urged to stay out of the water this morning. Photo: Kim Treasure.

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.

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.

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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.

The Australian Government said it was working to determine a damage assessment and what assistance may be required.

 

 

 

Original Article published by Kim Treasure on About Regional.

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The BOM weather app gives me a tsunami warning in Narrabundah…

An undersea volcano and a Tsunami. Queue the Climate Change lobby, 3,2,1…..

Futureproof .. Twitter are onto it

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vika mana
@endlessyarning

A volcano erupting in Tonga and heard by several other nations also affected by the floods and waves, should be the biggest indicator that this is a climate emergency.

Time and time again people from our nations warn the world of the outcomes and yet still don’t listen.
9:59 PM · Jan 15, 2022·Twitter for iPhone

IF the oceans are warming, then the water will weigh less. No?

Ocean current flows might speed up.

And of course, none of that could affect anything else?

LOL!!!!

I’m a skeptic myself. But I’m not a climate change skeptic.

Capital Retro2:18 pm 16 Jan 22

Since the BOM’s enhanced sea level monitoring network isn’t detecting any rises in sea levels predicted by the climate change industry, they use the technology instead to verify the existence of a tsunami.

The Bureau then promulgates advice and warnings on any possible tsunami threat to State & Territory emergency management services, media and the public.

Capital Retro7:49 am 17 Jan 22

Half of Tonga’s electricity comes from solar. All of Tonga is covered now by volcanic ash cloud and if it rains it could be acid rain. So-long solar.

Why does BOM report sea level rises around Australia, mapped by extent of rise, if it “isn’t detecting any rises”?

See the charts.
http://www.bom.gov.au/state-of-the-climate/oceans.shtml

Timboin your observations on the volcano are indeed very interesting.
They are already going national.

Interesting and probably very complex question.
Water is most dense at around 4C. So most water in our oceans will become less dense and thus weigh less as it warms.
Thus 1L of water straight from my kettle should weigh less than 1L of water from my fridge.

However if I take 1L of fridge water and heated it to 50C and then weighed it, I suspect it will weigh the same.

What will have changed is the volume. My 1L of water will still weigh the same but will now be more than 1L of water.

So warming the oceans could mean that the weight of water over any particular point of ocean bottom may be about the same, but the volume (and thus depth) of the water has increased.

Of course this would be complicated by factoring in water that is now covering land that was not under water before, and water that has been added to the oceans from melting glaciers.

Regarding ocean currents, they are tricky things created by many factors including the temperature differences between parts of the ocean. I have no idea what affect a warmer ocean will have.

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