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DEW
  • DEW
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12 July 2024 22:39:56

I'm too lazy to look it up myself, but does anybody on here know if the Italian volcanoes are interconnected?

Originally Posted by: StoneCroze 


AFAIK Etna and Stromboli draw from the same magma reservoir though not directly connected. The reservoir is a low-silica basaltic type, h=which flows easily and typically gives a sequence of frequent but not especially violent eruptions, often descried as Strombolian. Stromboli has been in more or less continuous eruption for the last 5000 years. 

The contrasting type of eruption is Plinian, after Pliny the Younger's description of the eruption of Vesuvius which buried Pompeii. Plinian eruptions are sourced by rhyolite, a high-silica viscous magma, which tends to stick until the pressure is too great, and then it goes bang! Etna does this in a small way occasionally, but Vesuvius is exclusively Plinian; so presumably a different part of any magma reservoir even if it's all driven by the movement of the African plate and the Italian microplate against Europe.

The really alarming one is the Campi Flegrei caldera, a supervolcano underlying much of Naples which could blow any time, and has been producing rises and falls of several metres of ground level recently. When this blew about 40,000 years ago, the volume of ash ejected is conservatively estimated at 36 cubic miles (yes, the units are correct, and that's one of the lower estimates) and is thought to have wiped out early human and Neanderthal populations of Europe. https://en.wikipedia.org/wiki/Phlegraean_Fields
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Roger Parsons
13 July 2024 05:22:17
Excellent post - thanks David.
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
StoneCroze
13 July 2024 06:03:33
I agree, very interesting. One of those geographical features which has been a constant all my life. Etna usually features on the news at some point during the year.
I know a little about the Hawaii island chain and they were/are formed by magma coming up as the tectonic plate moves over a magma chamber hot spot.
Alderney, Channel Islands. (previously known as Beaufort)
NMA
  • NMA
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13 July 2024 07:18:34

I agree, very interesting. One of those geographical features which has been a constant all my life. Etna usually features on the news at some point during the year.
I know a little about the Hawaii island chain and they were/are formed by magma coming up as the tectonic plate moves over a magma chamber hot spot.

Originally Posted by: StoneCroze 


Thank you for those thoughts. My son went Etna and other volcanoes on a school trip several years ago. I asked him to bring back some of the eruptions which he duly did. Very light black foam pieces.
On the same note, I brought back a lava bomb from Vestmannaeyjar in Iceland many more years before that. It has a dimple where it hit the ground red/white-hot.

I follow the Naples movements. If it ever does go off in our lifetimes or of course whenever, it will probably have a massive impact on European societies and further afield.
Vale of the Great Dairies
South Dorset
Elevation 60m 197ft
Chunky Pea
18 July 2024 15:27:06
According the 'Geologyhub', Iceland could be looking at yet another eruption soon as magma is building up again under the surface. 
Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
Saint Snow
18 July 2024 16:21:43


The really alarming one is the Campi Flegrei caldera, a supervolcano underlying much of Naples which could blow any time, and has been producing rises and falls of several metres of ground level recently. When this blew about 40,000 years ago, the volume of ash ejected is conservatively estimated at 36 cubic miles (yes, the units are correct, and that's one of the lower estimates) and is thought to have wiped out early human and Neanderthal populations of Europe. https://en.wikipedia.org/wiki/Phlegraean_Fields

Originally Posted by: DEW 




It's actually the magma which was at least 36 cubic miles (ash ejected was probably by multiples greater than that)

Vesuvius is, of course, part of that same Campanian Volcanic Arc that includes Campi Flegrei. In fact, the whole Bay of Naples is effectively a giant caldera.

Interestingly, and tying in with your first paragraph of that post, Roger, this Wiki article says:

"Campanian Volcanic Arc" is something of a term of convenience, since the area is part of the same large area of intense volcanic and seismic activity that includes, further to the south, the active island volcanoes of Stromboli, and Vulcano off the north coast of Sicily and even the largest active volcano in Europe, Mount Etna, on Sicily.




https://en.wikipedia.org/wiki/Campanian_volcanic_arc 

Having been to Naples, I can say that if a nearby volcano did majorly erupt, it would cause millions of Euros worth of improvements.



Martin
Home: St Helens (26m asl) Work: Manchester (75m asl)
A TWO addict since 14/12/01
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Aneurin Bevan
DEW
  • DEW
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18 July 2024 16:48:49

It's actually the magma which was at least 36 cubic miles (ash ejected was probably by multiples greater than that)

Originally Posted by: Saint Snow 


I stand corrected - it was some sloppy copying from Wiki which in the next breath goes on to say that ash covered much of Russia.
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
NMA
  • NMA
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19 July 2024 06:52:50

It's actually the magma which was at least 36 cubic miles (ash ejected was probably by multiples greater than that)

Vesuvius is, of course, part of that same Campanian Volcanic Arc that includes Campi Flegrei. In fact, the whole Bay of Naples is effectively a giant caldera.

Interestingly, and tying in with your first paragraph of that post, Roger, this Wiki article says:

https://en.wikipedia.org/wiki/Campanian_volcanic_arc 

Having been to Naples, I can say that if a nearby volcano did majorly erupt, it would cause millions of Euros worth of improvements.

Originally Posted by: Saint Snow 


One way of putting it. A blessing introduced under a cloak of pyroclastic flows?
Of course we're spoilt for further explosive choices in that part of the world.
Further east into the Aegean, the huge Minoan eruption of Santorini in the 17th century BC may have inspired the legend of Atlantis. It was rated 7 in the Smithsonian Global Volcanism Program's Volcanic Explosivity Index.
Today, the relatively new picturesque whitewashed Instagrammable houses would not be my choice of real estate (apologies for that Americanism) let alone a place to live. Why do people choose to live in or on active volcanoes?
Naples really takes the biscuit though.

Vale of the Great Dairies
South Dorset
Elevation 60m 197ft
Roger Parsons
21 July 2024 16:42:15
Jul 20, 2024: Surprising Eruption from Fuego Volcano, Guatemala


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
ozone_aurora
24 July 2024 17:12:25
In today's news, there has been a hydrothermal explosion in Biscuit Basin at Yellowstone:-
https://www.theguardian.com/us-news/video/2024/jul/24/geyser-eruption-in-yellowstone-national-park-sends-visitors-fleeing-video 
DEW
  • DEW
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24 July 2024 18:59:18

In today's news, there has been a hydrothermal explosion in Biscuit Basin at Yellowstone:-
https://www.theguardian.com/us-news/video/2024/jul/24/geyser-eruption-in-yellowstone-national-park-sends-visitors-fleeing-video 

Originally Posted by: ozone_aurora 


Let's just hope it stays small. Yellowstone is one of those places with potential global impacts
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
doctormog
24 July 2024 19:05:58
I think it is a relatively regular occurrence just slightly larger than normal this time and in the proximity to people, hence the media coverage. In isolation it’s not really indicative of any increase in overall activity. 
Having said that I don’t think I would have liked to have been right beside the explosion!
Chunky Pea
04 August 2024 09:50:39
Etna really spewing out this morning:


Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
Chunky Pea
04 August 2024 15:30:19
Very impressive eruption it must be said. 

Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
DEW
  • DEW
  • Advanced Member
08 August 2024 15:00:12
Flights to eastern Sicily suspended
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Chunky Pea
10 August 2024 05:07:31
Lots of speculation over the last few days that the grindivik volcano is going to blow again but nothing really happening at all. 
Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
doctormog
10 August 2024 06:17:43

Lots of speculation over the last few days that the grindivik volcano is going to blow again but nothing really happening at all. 

Originally Posted by: Chunky Pea 


I suspect it may erupt again within the next week based on the monitoring data.
DEW
  • DEW
  • Advanced Member
10 August 2024 17:46:45
Good analysis of situation at Stromboli here:
https://www.bbc.com/future/article/20240806-why-scientists-are-excited-about-italys-volcanoes 

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

Chichester 12m asl
ozone_aurora
18 August 2024 10:00:48
The explosive eruption of the 300-year-old RAS lava dome of the Sheveluch Volcano, in Kamchatka, Russia, began at 11:45 UTC on August 17, 2024. The blasts sent ashes up to 8 km high and at 12:00 UTC, the explosions sent ashes up to 9 km high. At 15:50 UTC, the ash panache spread over 492 km southeast (115 degrees) of the volcano. Ashes occur in the village of Oust-Kamchatsk.

According to video data from KVERT IVS FEB RAS, the explosive eruption is currently ongoing, the eruption column rises up to 5 km high, the ash panache is spreading to the southeast of the volcano. The volcano has produced some quite spectacular lightning activity.

Explosions of ash up to 10 kilometers in height could occur at any time. Ongoing activities could affect international planes and flying at low altitude.

Source: KVERT 17.08.2024 / 20h40 Z
Roger Parsons
18 August 2024 10:10:08
Thanks for that heads-up. Here's CNN's report on the eruption:
Volcano erupts in Russia after 7.0-magnitude earthquake, sending ash column 5 miles high
https://edition.cnn.com/2024/08/17/world/earthquake-kamchatsky-tsunami-warning-russia-intl-latam/index.html 
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
Roger Parsons
18 August 2024 11:45:59
I have come across this interesting webpage on "Volcano Discovery". Might prove useful...
Shiveluch Volcano satellite images
https://www.volcanodiscovery.com/shiveluch-satImages.html 
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
18 August 2024 11:53:03
I did wonder of there would be volcanic activity in Kamchatka after that magnitude 7 quake. Thankfully it’s in an rea well used to such activity. I love this image  of the eruption, almost surreal.
Chunky Pea
22 August 2024 21:46:13
Iceland on fire once again. 

Edit: As far as I can tell from the cam footage, the eruption is taking place pretty much where previous eruptions have. Blue Lagoon power plant could be under threat again if it continues for a few days. Workers still there building dams. Fair play to them.
Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
ozone_aurora
23 August 2024 10:20:16
Live views of Reykjanes eruption:-

https://www.youtube.com/watch?app=desktop&v=804nPrAUAxg&fbclid=IwY2xjawE1P55leHRuA2FlbQIxMAABHW0tmbhS5c52YpIFiJ4GWrGv5HeciHTAHIqSk6LwYj21JxzZ2EYrLuuNlg_aem_o3Be9FTpEtCy7AWMiPA7Yg.

ozone_aurora
23 August 2024 10:21:44
Why won't it highlight the link?
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