General Volcanic Activity Thread!

[matty40s]

 

 

Edited January 17, 2022 by matty40s

[SnowBear]

Pacific volcano: British woman reported missing after Tonga tsunami

WWW.BBC.CO.UK

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Friends say on social media that Angela Glover appears to have been swept away in the disaster.

 

 

[Guest]

Seems like there were reports last night of another explosive episode from Hunga Tonga with a small Tsunami reaching Samoa. That said infrared and seismic activity doesn’t really back this up. Maybe there was a small under landslide? 

[Dreckly]

https://www.volcanodiscovery.com/home.html

Second pass of shock wave detected (images) 

[The PIT]

31 minutes ago, Alderc said:

Seems like there were reports last night of another explosive episode from Hunga Tonga with a small Tsunami reaching Samoa. That said infrared and seismic activity doesn’t really back this up. Maybe there was a small under landslide? 

I think that eruption was a mistaken report.

[SnowBear]

Why the volcanic eruption in Tonga was so violent, and what to expect next

THECONVERSATION.COM

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The eruption is akin to a weapons-grade chemical explosion, and there could be several weeks or even years of major volcanic unrest to follow.

 

[ChezWeather]

Apologies if this has already been asked/posted, but does anyone have a brief summary of how an eruption of this size can effect the weather around the globe and possibly here it the UK? 

[Downburst]

22 minutes ago, ChezWeather said:

Apologies if this has already been asked/posted, but does anyone have a brief summary of how an eruption of this size can effect the weather around the globe and possibly here it the UK? 

I understand the main impact will be from the amount of Sulphur Dioxide, so over the coming days we shall see analysis on that, which will be fascinating. In the meantime good article "www.severe-weather.eu/news/tonga-volcano-massive-eruption-explosion-stratosphere-usa-tsunami-shockwave-fa/"

[Downburst]

Note you can see todays Copernicus data for Sulphur Dioxide and clearly shows the Tonga region, westerly winds and there it is, good job it's in the southern hemisphere as I don't want a chance of a year with no winter if this thing keeps blowing 

Should Edit to show the position on Friday before the eruption

Edited January 17, 2022 by Downburst

[swebby]

An impressive animation of the pressure waves and the rebound over northern Africa.

 

 

 

[swebby]

20 hours ago, SNOW_JOKE said:

From my perspective Campi Flegri in Italy (already showing signs of unrest) or Laacher See in Germany pose the more biggest risk than Yellowstone although you don't necessarily need a full-blown VEI8 eruption for Global Cooling effects to impact globally as Laki in 1783 has shown.

 

In regards to risk and putting aside VEI7+ eruptions that are incredibly unlikely to occur anywhere on the globe in our lifetimes.

A standard moderate sized eruption of either Campi Flegrei or Mount Vesuvius would be catastrophic at a local level.  The expansion of Naples and the surrounding area now stands at over 3 million people! With development ongoing high on the flanks of Vesuvius, if there is insufficient notice (weeks) of an eruption, the consequences are hard to imagine.

[Guest]

Taking a look around it looks as though parts of Chile & Peru may have picked up the largest of the Tsunami waves with sea level rises of at least 2metres being reporting, there's also a video clip of fishing vessels climbing over a very large wave in relatively open water. I wonder if a St Helens type landslide has occurred below the surface and may have focused the waves energy in specific direction i.e. Eastwards? Also there's almost nothing between Tonga and South American but deep ocean so less to refract and impair the waves?

Separately I think the wave height of 4ft in Tonga is going to be a pretty large under-estimation when communications are re-established.  

[SnowBear]

First reported death.. 

Pacific volcano: Body of British woman found in Tonga, says brother

WWW.BBC.CO.UK

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Angela Glover was swept away by the tsunami as she tried to rescue her dogs, her brother says.

 

[Puddy Galore]

1 hour ago, SnowBear said:

First reported death.. 

Pacific volcano: Body of British woman found in Tonga, says brother

WWW.BBC.CO.UK

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Angela Glover was swept away by the tsunami as she tried to rescue her dogs, her brother says.

 

So very sad to lose someone who did so much good

[Jo Farrow]

 

 

[Jo Farrow]

 

[The PIT]

12 minutes ago, Jo Farrow said:

 

Explains the two twitches on my barograph. I guessed the other one was the same wave but coming round the other way.

[SnowBear]

20 minutes ago, The PIT said:

Explains the two twitches on my barograph. I guessed the other one was the same wave but coming round the other way.

The rebound from antipode, somewhere in Algiers, Africa. 

[Jo Farrow]

41 minutes ago, The PIT said:

Explains the two twitches on my barograph. I guessed the other one was the same wave but coming round the other way.

That was suggested here too 

 

[Climate Man]

29 minutes ago, SnowBear said:

The rebound from antipode, somewhere in Algiers, Africa. 

I certainly have the first one showing.  Very worrying time.  My dad's sister married a Tongan and so have family out there by marriage.  Silence so far....

[Guest]

1 hour ago, Jo Farrow said:

 

 

I saw this image somewhere, there must of been a flank collapse to some degree. 

[Snowyowl9]

The ash is blowing torwards aussie they ll get a colder summer then..

While I can t see any change of any colder weather coming here...

What a myth...

[Guest]

Wow - looks like 3-4sq kilometres of land has just gone. 
 

 

[Jo Farrow]

Many weather enthusiasts around the world recorded pressure shockwaves from an event in Tonga. The violent eruption of the underwater Hunga-Tonga volcano caused distinctive blips on barographs.  

Barograph blips from Tonga volcanic eruption, as shockwaves reach around the world

WWW.NETWEATHER.TV

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Many weather enthusiasts around the world recorded pressure shockwaves from an event in Tonga. The violent eruption of the underwater Hunga-Tonga volcano caused distinctive blips on barographs

 

[The PIT]

I wonder why different speeds? I would thought the shock wave would have had the same speed.