Tag Archives: Volcano Cafe

Millennium Volcanoes

It’s been a while since I’ve been able to visit one of my favourite Cafes and so, armed with a mug of coffee, I have just enjoyed reading this meticulous article, written by Albert. I am aware that ice core examinations reveal vast treasure troves of information in relation to past volcanic eruptions. Recommended reading for this peaceful Wednesday morning and yes… it is likely a wise idea to keep an eye on the volcanoes listed on Albert’s spreadsheet. Thank you for sharing this information with us, Albert.

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Pompeii and Vesuvius. Engraving by Friedrich Federer, 1850. (WikiMedia Commons) Pompeii and Vesuvius. Engraving by Friedrich Federer, 1850. (WikiMedia Commons)

Volcanic eruptions have become major attractions, and even rather minor eruptions can make front page news. In modern days, any volcano deciding to erupt will find itself instantly monitored and Volcano-Cafe’d. But in the days before global coverage (and, dare I say it, Volcano blogs), many eruptions went unnoticed. Thus, in May 1831 and again in August, parts of Europe and the coast of Africa were covered in a “dry fog” similar to (but not as extensive as) the one caused by Laki in 1783. But the sulphuric haze (if that is was what it was) was not identified as volcanic and the culprit has never been discovered. For older eruptions, the existence of records depends entirely on location. We have very good dates for Vesuvius or Mount Fuji, but none whatsoever for Mount Erebus. In 1915, Shackleton described seeing…

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The Strangest Volcanoes In The World – A Non-Official List

Another absorbing read from the incredible folk at one of my favourite haunts, the Volcano Café. Yellowstone and Teide are two of the more famous volcanoes. I’m going to enjoy learning about the others on this list. Thank you once more, Volcano Café 🙂

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In light of the extremely unique and interesting events going on at Vatnajökull, it’s interesting to ponder how different they can be from one another. I had originally intended that this post would be an ordered ranking of the strangest volcanoes in the world, but you really can’t form proper comparisons between one type of weirdness and another.

The other problem I had is a lack of information. Part of the issue is that a lot of money goes into researching a limited amount of volcanoes every year. Due to requiring grants to fund research, researchers typically focus more of their attention on volcanoes that are currently erupting, close to large population centers, and in countries that can afford to subsidize such research. So while there are likely many more oddballs out there, they may not be known or studied enough to make it into this post.

In this post…

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Changes in Bárdarbunga Caldera

Interesting developments detailed in the latest on the Bárdarbunga Volcano, published by the incredible Carl of the Volcano Café. Recommended reading once more. Reblogged with much gratitude.

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Image of the Holuhraun eruption taken by the Volcanocafé Productions Film expedition to Bárdarbunga. This image is from the upcoming film by Eggert Norddahl, Bergsveinn Norddahl and Nick Small. Produced by Volcanocafé. Image of the Holuhraun eruption taken by the Volcanocafé Productions Film expedition to Bárdarbunga. This image is from the upcoming film by Eggert Norddahl, Bergsveinn Norddahl and Nick Small. Produced by Volcanocafé.

During a scientific over flight a marked and unexpected drop was noticed in the caldera floor of the Bárdarbunga Central Volcano. The drop was 15 meters, and is as such the largest deformation of a caldera in Iceland. It is interpreted as the result of magma leaving the magmatic reservoir under the caldera floor.

If this number is valid for all of the 11 by 7km caldera it equals to a volume of drained magma of 808 million cubic meters, or just shy of a cubic kilometer. This does not take into account magma that has come into the system during this episode

Image of the Holuhraun eruption taken by the Volcanocafé Productions Film expedition to Bárdarbunga. This image is from the upcoming film by Eggert Norddahl, Bergsveinn Norddahl and Nick Small. Produced by Volcanocafé. Image of the Holuhraun eruption taken by the Volcanocafé Productions Film expedition to Bárdarbunga. This…

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Bardarbunga Update 20140903

The latest assessment of the Bardarbunga eruption provided by the amazing folk at the Volcano Café. Recommended reading once more. Thank you Carl and Henrik.

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Holuhraun eruption looking north from Dyngjujökull (Photograph by Einar Gudmann) Holuhraun eruption looking north from Dyngjujökull (Photograph by Einar Gudmann)

Since the appropriate Icelandic authorities have today publicly mentioned the possibility of a large, acidic and explosive eruption at Bardarbunga, we now feel free to inform you that this possibility has been discussed by the Dragons, behind closed doors, for well over a week. The key information comes from this official IMO graphic:

The first premise is that earthquakes do not occur in molten rock. Nor do they form a clearly visible ring shape such as the above except under one circumstance – they do so around a body of liquid, in this case magma. A conservative estimate places the size of this body of magma at 8 km diameter, height unknown but most likely on the order of 3 – 6 km, depth also unknown but relatively shallow. Using simple geometry, 4 x Pi x r3 / 3…

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Bárðarbunga reader question

Interesting assessment of the Bardabunga intrusion from the resourceful Volcano Café blog. Recommended reading indeed. Thank you Carl – very much appreciated.

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Image by Tom. Upper part shows a closed propagating dyke. The lower shows a rift open down to the mantle. The upper version draws its magma from a central volcano, the lower from the mantle. Upper alternative would give a smaller eruption than the lower. Image by Margaret E. Hartley/Thor Thordarson. Upper part shows a closed propagating dyke. The lower shows a rift open down to the mantle. The upper version draws its magma from a central volcano, the lower from the mantle. Upper alternative would give a smaller eruption than the lower.

Richie, one of our readers emailed in a good question that is a good starting point for a brief update on Bárðarbunga.

Could you do an article comparing this intrusion to others? Looking at the post it appears that it is almost 40 Km long but how wide is it and in terms of volume. I am not sure if any diagrams are available to give an indication of the size underground. ”

It is hard to compare this intrusion to any other that we have instrumental data on. The main reason is that we have not seen one like this…

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