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Roger Parsons
05 December 2021 09:05:38

Reflecting on the recent newsworthy volcanic eruptions mentioned above I did some [rather unproductive] searching for recent research on the impact of volcanic dust on climate. I did however encounter an intriguing paper on the correlation between Volcanic impact and political upheaval which I feel sure some posters will enjoy thinking about:

"State or societal collapses are often described as featuring rapid reductions in socioeconomic complexity, population loss or displacement, and/or political discontinuity, with climate thought to contribute mainly by disrupting a society’s agroecological base."

Volcanic climate impacts can act as ultimate and proximate causes of Chinese dynastic collapse
https://www.nature.com/articles/s43247-021-00284-7




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
doctormog
22 December 2021 10:25:20
I’m keeping a very close eye on Iceland this morning as there is a very large ongoing swarm of activity where the earlier eruption was. There could be a new event very shortly.
Hippydave
22 December 2021 12:00:46

I’m keeping a very close eye on Iceland this morning as there is a very large ongoing swarm of activity where the earlier eruption was. There could be a new event very shortly.

Originally Posted by: doctormog 


Hadn't spotted that, ty for the heads up


Certainly a rather dramatic uptick in tremor:-


Fagradalsfjall Iceland Earthquake Live Stream - YouTube


Existing crater has some smoke/steam rising although not sure that's unusual as it's been doing that since the eruption stopped, presumably just latent heat.


 


Home: Tunbridge Wells
Work: Tonbridge
Chunky Pea
24 December 2021 17:46:19
MDL Iceland cam caught a small tremor at the Geldingadair volcano just after 3pm today:


You can even see a few rocks being shaken out of place on the volcano itself.
Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
wingman
15 January 2022 08:44:05

Just caught this on the news, Hunga Tonga-Hunga Haʻapai eruption;


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


Some of what is being reported in terms of where impacts are being felt is astonishing (e.g sounds of the eruption being heard over 500 miles away).


 

Perthite1
15 January 2022 08:58:16
Ash cloud of 100,000 feet? As being reported over here in Australia. That’s a very large eruption.
doctormog
15 January 2022 09:01:14

The footage shows it is a very powerful eruption. The satellite imagery is remarkable: 


 


 




Roger Parsons
15 January 2022 09:04:37


Just caught this on the news, Hunga Tonga-Hunga Haʻapai eruption;


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


Some of what is being reported in terms of where impacts are being felt is astonishing (e.g sounds of the eruption being heard over 500 miles away).


 


Originally Posted by: wingman 


Short clip here - impressive and frightening. There is a lot of low land in Tonga and many people could be affected.


https://www.bbc.co.uk/news/av/world-asia-60007163


Here's the NZ coverage:


https://www.rnz.co.nz/news/top/459618/live-updates-tsunami-advisory-for-parts-of-nz-s-north-island-waves-crashing-into-tonga


 


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
Gandalf The White
15 January 2022 09:28:20


Just caught this on the news, Hunga Tonga-Hunga Haʻapai eruption;


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


Some of what is being reported in terms of where impacts are being felt is astonishing (e.g sounds of the eruption being heard over 500 miles away).


 


Originally Posted by: wingman 


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


Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


picturesareme
15 January 2022 11:54:59


The footage shows it is a very powerful eruption. The satellite imagery is remarkable: 


 


 




Originally Posted by: doctormog 


I wonder what the VEI is for the eruption?

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. 


Purley, Surrey, 70m ASL

"We have some alternative facts for you"

Kelly-Ann Conway - former 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.

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