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Online Roger Parsons  
#1061 Posted : 15 January 2022 11:55:13(UTC)
Roger Parsons

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Location: Lincolnshire

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

Offline james  
#1062 Posted : 15 January 2022 13:31:39(UTC)
james

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Location: Cambridge 19masl

Originally Posted by: Gandalf The White Go to Quoted Post

 

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.

Cambridge 19masl
Offline The Beast from the East  
#1063 Posted : 15 January 2022 13:47:50(UTC)
The Beast from the East

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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

Offline picturesareme  
#1064 Posted : 15 January 2022 14:27:54(UTC)
picturesareme

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Offline Devonian  
#1065 Posted : 15 January 2022 17:17:10(UTC)
Devonian

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Originally Posted by: picturesareme Go to Quoted Post

 

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

Online doctormog  
#1066 Posted : 15 January 2022 17:26:03(UTC)
doctormog

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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 

SHOW TWEETS

Edited by user 15 January 2022 17:31:23(UTC)  | Reason: Not specified

Offline picturesareme  
#1067 Posted : 15 January 2022 17:57:38(UTC)
picturesareme

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Location: costa solent

Originally Posted by: Devonian Go to Quoted Post

 

 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.

Offline ozone_aurora  
#1068 Posted : 15 January 2022 18:19:01(UTC)
ozone_aurora

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Location: Sheffield

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

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

 

Online doctormog  
#1069 Posted : 15 January 2022 19:10:21(UTC)
doctormog

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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.
Offline james  
#1070 Posted : 15 January 2022 19:22:14(UTC)
james

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Location: Cambridge 19masl

Originally Posted by: doctormog Go to Quoted Post
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?

Cambridge 19masl
Offline Gandalf The White  
#1071 Posted : 15 January 2022 19:46:12(UTC)
Gandalf The White

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Originally Posted by: doctormog Go to Quoted Post
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

Online doctormog  
#1072 Posted : 15 January 2022 20:57:48(UTC)
doctormog

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Posts: 74,692

Originally Posted by: doctormog Go to Quoted Post
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. 


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.

SHOW EXTERNAL IMAGES

Offline Devonian  
#1073 Posted : 15 January 2022 21:00:36(UTC)
Devonian

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Originally Posted by: doctormog Go to Quoted Post
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

Offline Devonian  
#1074 Posted : 15 January 2022 21:01:45(UTC)
Devonian

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Location: East Dartmoor

Originally Posted by: doctormog Go to Quoted Post

 

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


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.

SHOW EXTERNAL IMAGES

'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

Online Heavy Weather 2013  
#1075 Posted : 15 January 2022 21:04:23(UTC)
Heavy Weather 2013

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Joined: 16/01/2013(UTC)
Posts: 6,182
Location: Muswell Hill, North London

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.

Offline Devonian  
#1076 Posted : 15 January 2022 21:15:27(UTC)
Devonian

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Location: East Dartmoor

Originally Posted by: Heavy Weather 2013 Go to Quoted Post
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

Offline Devonian  
#1077 Posted : 15 January 2022 21:26:59(UTC)
Devonian

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Location: East Dartmoor

 A very impressive picture

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

Edited by user 15 January 2022 21:30:11(UTC)  | Reason: Not specified

'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

Offline Retron  
#1078 Posted : 16 January 2022 03:18:38(UTC)
Retron

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Posts: 27,643
Location: Leysdown-on-Sea

Originally Posted by: Devonian Go to Quoted Post

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!

Offline DEW  
#1079 Posted : 16 January 2022 06:41:01(UTC)
DEW

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Location: Chichester 12m. asl

Originally Posted by: Devonian Go to Quoted Post

 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)

"The sky was an exquisitely deep blue just then, with filmy white clouds drawn up over it like gauze"
Offline Hungry Tiger  
#1080 Posted : 16 January 2022 11:05:30(UTC)
Hungry Tiger

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Posts: 25,719
Location: South Cambridgeshire

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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