Roger Parsons
15 January 2022 11:55:13

Some "InfoGraphics" from NZ.

Tonga: Size of eruption put into perspective (InfoGraphics & Maps)
https://www.weatherwatch.co.nz/content/tonga-size-of-eruption-put-into-perspective-x4-infographics



Roger


RogerP

West Lindsey district of Lincolnshire

Everything taken together, here in Lincolnshire are more good things than man could have had the conscience to ask.

William Cobbett, in his Rural Rides - c.1830

james
15 January 2022 13:31:39

Originally Posted by: Gandalf The White 

 

The pressure wave was detected as it passed over Auckland, with a 4mb pressure blip. That’s 1,250 miles away.

 

Do you think will be able to detect a pressure wave in the UK? It should be around 5pm I'd have thought.

The Beast from the East
15 January 2022 13:47:50

Reminds me of Mt St Helens and sudden explosive eruption. 


"We have some alternative facts for you"

Kelly-Ann Conway - special adviser to the President

Devonian
15 January 2022 17:17:10

Originally Posted by: picturesareme 

 

I wonder what the VEI is for the eruption?

 Looks like it's more than 5.  7 looks too high.

A low 6?


'living with covid' = 'ignoring covid'.



"When it takes nearly 900,000 votes to elect one party’s MP, and just 26,000 for another, you know something is deeply wrong."

The electoral reform society, 14,12,19

doctormog
15 January 2022 17:26:03

I see the entire west coast of the US and Canada are under a tsunami advisory currently with a (relatively) small tsunami impacting certain parts. The amount of energy released in this eruption seems immense and I have read reports of the shockwave been heard in Alaska (confirmed by the NWS).

This is Santa Cruz CA a short while go:

 

And a second surge at the same location: https://twitter.com/TimCatteraPhoto/status/1482396514504691713 


picturesareme
15 January 2022 17:57:38

Originally Posted by: Devonian 

 

 Looks like it's more than 5.  7 looks too high.

A low 6?

I was thinking at least a 5 myself but I was reading this which would suggest only 2 if I'm reading it correctly.

 

https://www.gdacs.org/report.aspx?eventtype=VO&eventid=1000036

 

Surely it's bigger than a 2.

ozone_aurora
15 January 2022 18:19:01

Get away from shore: US and Japan warn on tsunami - BBC News

https://www.bbc.co.uk/news/world-asia-60007119.

 

doctormog
15 January 2022 19:10:21
My WS has just recently recorded the increased pressure reading associated with the shockwave from the eruption. Just a small but very noticeable blip. Really impressive.
james
15 January 2022 19:22:14

Originally Posted by: doctormog 

My WS has just recently recorded the increased pressure reading associated with the shockwave from the eruption. Just a small but very noticeable blip. Really impressive.

 

What were your readings, could you maybe even post a graph?

Gandalf The White
15 January 2022 19:46:12

Originally Posted by: doctormog 

My WS has just recently recorded the increased pressure reading associated with the shockwave from the eruption. Just a small but very noticeable blip. Really impressive.

That is remarkable - the shock wave has travelled half way around the planet.

 


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



doctormog
15 January 2022 20:57:48

Originally Posted by: doctormog 

My WS has just recently recorded the increased pressure reading associated with the shockwave from the eruption. Just a small but very noticeable blip. Really impressive.

As I said, nothing too exciting or noteworthy unless you knew what you were looking for, but here you go. 

FBCBBA87-E77-F-4094-818-F-60-E15-F554-E0-D

It’s the blip to the right. It was basically a 1hPa increase (when pressure had been falling all day and currently is) followed by a quick 2hPa drop.


Devonian
15 January 2022 21:00:36

Originally Posted by: doctormog 

My WS has just recently recorded the increased pressure reading associated with the shockwave from the eruption. Just a small but very noticeable blip. Really impressive.

I've just looked at mine and there's a blip here too - or an up then down. And the barometer seems to have settled down 1mb lower...

 

 


'living with covid' = 'ignoring covid'.



"When it takes nearly 900,000 votes to elect one party’s MP, and just 26,000 for another, you know something is deeply wrong."

The electoral reform society, 14,12,19

Devonian
15 January 2022 21:01:45

Originally Posted by: doctormog 

 

As I said, nothing too exciting or noteworthy unless you knew what you were looking for, but here you go. 

FBCBBA87-E77-F-4094-818-F-60-E15-F554-E0-D

It’s the blip to the right. It was basically a 1hPa increase (when pressure had been falling all day and currently is) followed by a quick 2hPa drop.

Yup, quite like that here too.


'living with covid' = 'ignoring covid'.



"When it takes nearly 900,000 votes to elect one party’s MP, and just 26,000 for another, you know something is deeply wrong."

The electoral reform society, 14,12,19

Heavy Weather 2013
15 January 2022 21:04:23
This event today really does put in perspective how powerful our planet is, and ultimately how insignificant we really are.

Absolutely fascinating day


Mark

Beckton, E London

Less than 500m from the end of London City Airport runway.

Devonian
15 January 2022 21:15:27

Originally Posted by: Heavy Weather 2013 

This event today really does put in perspective how powerful our planet is, and ultimately how insignificant we really are.

Absolutely fascinating day

I'm not sure they do actually - for me it's rather the opposite.


Humans move vastly more material about on this planet than the forces of geology do and the long term feed of gasses we put into the atmosphere will have much more impact than this eruption on the atmosphere. 

The way I look at it, it's a very big volcanic eruption but a blip compared to the long term effect we are having. That is what puts it into perspective for me.


'living with covid' = 'ignoring covid'.



"When it takes nearly 900,000 votes to elect one party’s MP, and just 26,000 for another, you know something is deeply wrong."

The electoral reform society, 14,12,19

Devonian
15 January 2022 21:26:59

 A very impressive picture

...which doesn't seem to want to load anymore


'living with covid' = 'ignoring covid'.



"When it takes nearly 900,000 votes to elect one party’s MP, and just 26,000 for another, you know something is deeply wrong."

The electoral reform society, 14,12,19

Retron
16 January 2022 03:18:38

Originally Posted by: Devonian 

Yup, quite like that here too.

And from here as well:

https://www.wunderground.com/dashboard/pws/ILEYSDOW1/graph/2022-01-15/2022-01-15/daily

It's also interesting how the pressure had been remarkably stable up until the shockwave hit, after the main shockwave it then became more erratic on the graph. Aftershocks? A distortion caused by the wave making the high wobble, so to speak? Who knows, but it's fascinating to see!

DEW
  • DEW
  • Advanced Member
16 January 2022 06:41:01

Originally Posted by: Devonian 

 A very impressive picture

...which doesn't seem to want to load anymore

The link is working again this morning with pictures (though a further link to an animation is rather slow)


"Quick zephyrs blow, vexing daft Jim" - another weather pangram
Hungry Tiger
16 January 2022 11:05:30

I'd love to know what the TNT equivalents are of this.

There's only about 2 or 3 volcanoes that have had explosions so violent that pressure waves have travelled round the world.

Tambora and Krakatoa come to mind.

Krakatoa was 220 megatons equivalent and the shock wave went round the planet 4 times.

Tsar Bomba the largest nuclear weapon ever detonated. That was detonated in 1961 and it was 51 megatons equivalent and that travelled round the world twice.

 


Gavin S. FRmetS.

TWO Moderator.

Contact the TWO team - twomoderationteam@gmail.com

South Cambridgeshire. 93 metres or 302.25 feet ASL.



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