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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


 


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


Originally Posted by: Gandalf The White 


 


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


 


I wonder what the VEI is for the eruption?


Originally Posted by: picturesareme 


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


A low 6?

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


 


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


A low 6?


Originally Posted by: Devonian 


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

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.

Originally Posted by: doctormog 


 


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

Gandalf The White
15 January 2022 19:46:12

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.

Originally Posted by: doctormog 


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

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.

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.


Devonian
15 January 2022 21:00:36

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.

Originally Posted by: doctormog 


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...


 


 

Devonian
15 January 2022 21:01:45


 


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.


Originally Posted by: doctormog 


Yup, quite like that here too.

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

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

Absolutely fascinating day

Originally Posted by: Heavy Weather 2013 


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.

Devonian
15 January 2022 21:26:59

 A very impressive picture


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

Retron
16 January 2022 03:18:38


Yup, quite like that here too.


Originally Posted by: Devonian 


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!


Leysdown, north Kent
DEW
  • DEW
  • Advanced Member
16 January 2022 06:41:01


 A very impressive picture


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


Originally Posted by: Devonian 


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


War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
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 - [email protected]
South Cambridgeshire. 93 metres or 302.25 feet ASL.


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