www.bbc.com
www.bbc.com
We really only have one, because the Macauley Volcano is in international waters well outside our continental margin. Indonesia certainly has some bad luck in that department
Krakatoa isn't a super volcano because its magma chamber isn't huge enough.
We really only have one, because the Macauley Volcano is in international waters well outside our continental margin. Indonesia certainly has some bad luck in that department
Source: http://geological-library.blogspot.com/2014/07/indonesia-in-order-tectonic-world-grace_28.html
There's plenty of subduction happening within the region and that creates a lot of magma.
Source: https://upload.wikimedia.org/wikipedia/commons/2/22/Earth's_Inner_Layers_denoting_the_LAB.png
The diagram above shows an idealised view of an oceanic basaltic volcano but the principle is the same regardless of where abouts on the surface a volcano is located.
Source: https://www.geologyin.com/2018/04/scientists-decipher-magma-bodies-under.html
However from what I understand a super volcano occurs where there is a very large magma upwelling from the upper mantle that makes its way through a thin part of the crust into one or more huge magma chambers. These are mantle plumes, are in a fixed location and these are known as hotspots. This is illustrated in the diagram above which is of the Yellowstone hotspot
However when we look at volcanoes on the surface, we see that over geologic time they move. This is because of plate tectonics and as the plates move they move over the hotspots. This can best be seen in volcanic island chains such as Hawaii, or Indonesia itself. Even in North America the large hotspot can be tracked across the current surface.
Hopefully that and the diagrams helps explain it
Krakatoa isn't a super volcano because its magma chamber isn't huge enough.
- but I see your point.
Yep considering the size of it, but it pales in comparison. Don't think that I would want to be around when on of the supers goes off. Be far more angrier and volatile than she who must be obeyed at her most angriest and I have survived a few of those by effective strategic withdrawals by the method of very quick long strides.We really only have one, because the Macauley Volcano is in international waters well outside our continental margin. Indonesia certainly has some bad luck in that department
Source: http://geological-library.blogspot.com/2014/07/indonesia-in-order-tectonic-world-grace_28.html
There's plenty of subduction happening within the region and that creates a lot of magma.
Source: https://upload.wikimedia.org/wikipedia/commons/2/22/Earth's_Inner_Layers_denoting_the_LAB.png
The diagram above shows an idealised view of an oceanic basaltic volcano but the principle is the same regardless of where abouts on the surface a volcano is located.
Source: https://www.geologyin.com/2018/04/scientists-decipher-magma-bodies-under.html
However from what I understand a super volcano occurs where there is a very large magma upwelling from the upper mantle that makes its way through a thin part of the crust into one or more huge magma chambers. These are mantle plumes, are in a fixed location and these are known as hotspots. This is illustrated in the diagram above which is of the Yellowstone hotspot
However when we look at volcanoes on the surface, we see that over geologic time they move. This is because of plate tectonics and as the plates move they move over the hotspots. This can best be seen in volcanic island chains such as Hawaii, or Indonesia itself. Even in North America the large hotspot can be tracked across the current surface.
Hopefully that and the diagrams helps explain it
Krakatoa isn't a super volcano because its magma chamber isn't huge enough.
When you look at the 1883 eruption it is a little hard to believe
And Santorini
First bear into space?
www.bbc.com
And Deccan Traps
1. Deccan Volcanism – An Adventure in Science | Gerta Keller, Professor of Geosciences, Emeritus
massextinction.princeton.edu
Posted Jan 3, 2022And Deccan Traps
1. Deccan Volcanism – An Adventure in Science | Gerta Keller, Professor of Geosciences, Emeritus
I like to think that Deccan Traps were brought about due a convergence of shockwaves from the Chicxulub Impact. Not exactly the anti-pode, but given 60+ million years of tectonic movement, you never know.
gcaptain.com
That's bad news for the cruise tourism industry.Dozens Test Positive On Australian Navy Relief Ship Headed To Covid-Free Tonga
Learn about the arrival of a COVID relief ship in Tonga, showcasing international humanitarian efforts amidst the pandemic.
How do you make the leap from a report about military relief ships having COVID infected cases to cruise tourism industry?That's bad news for the cruise tourism industry.Dozens Test Positive On Australian Navy Relief Ship Headed To Covid-Free Tonga
Learn about the arrival of a COVID relief ship in Tonga, showcasing international humanitarian efforts amidst the pandemic.
The entire tourist cruise sector is in crisis because of COVID, the accident of an Australian military ship shows that if the epidemic cannot be controlled in a disciplined environment it will be even worse on a luxury cruise with civilian passengers of all ages and social classes.How do you make the leap from a report about military relief ships having COVID infected cases to cruise tourism industry?That's bad news for the cruise tourism industry.Dozens Test Positive On Australian Navy Relief Ship Headed To Covid-Free Tonga
Learn about the arrival of a COVID relief ship in Tonga, showcasing international humanitarian efforts amidst the pandemic.
There is a difference between fun and deliberately posting misinformation, unless your idea of "fun" is posting misinformation. There is way too much misinformation and, dare I say, "alternative facts" around today that is confusing people and worse (just look at the lies put out about COVID). We do not need more.
www.abc.net.au
Aww, there's a problem with the article's Space Weather link, neither Firefox nor Microsoft Edge can find and open it,
As Townsville slept, a giant 'plasma bubble' triggered by a distant volcano eruption hovered overhead
The Hunga Tonga-Hunga Ha'apai volcano eruption last year was so powerful it created a "super plasma bubble" in the upper atmosphere over northern Australia, likely disrupting precise GPS for hours.
