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Tag Archives: magma

Deep quakes reveal that magma is moving beneath an ancient German volcano

January 23, 2019   All
Deep quakes reveal that magma is moving beneath an ancient German volcano

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When it comes to active volcanoes, what country first comes to mind? Japan, perhaps? The US? What about Italy? These are all excellent examples, and understandably so. They have a wide range of fiery mountains that, at some point in the last 12,000 years, have erupted – a condition that, per the United States Geological Survey, makes them “active.” It’s easy to forget that plenty of once-prolific volcanoes around the world have long fallen silent; geologically tame countries were often once replete with effusive or explosive eruptions. Just take Germany’s Laacher See Volcano (LSV), found in the Eifel mountain range within the Rhineland-Palatinate state. This lake-filled cauldron (“caldera”) is a rather serene site today, but it was originally forged out of fury. Around 12,900 years ago, a cataclysmic eruption, one that coated plenty of Europe in ash, was responsible for creating the crater-like edifice that we can see there today. Make no mistake: coming in at a 6 on the Volcanic…
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New model suggests volcanoes fed by ‘mush’ reservoirs not molten magma chambers

December 6, 2018   All
New model suggests volcanoes fed by ‘mush’ reservoirs not molten magma chambers

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Volcanoes are not fed by molten magma formed in large chambers, finds a new study, overturning classic ideas about volcanic eruptions. Instead, the study suggests that volcanoes are fed by so-called ‘mush reservoirs’ – areas of mostly solid crystals with magma in the small spaces between the crystals. Our understanding of volcanic processes, including those leading to the largest eruptions, has been based on magma being stored in liquid-filled ‘magma’ chambers – large, underground caves full of liquid magma. However, these have never been observed. The new study, by researchers at Imperial College London and the University of Bristol and published today in Nature, suggests the fundamental assumption of a magma chamber needs a re-think.
Source: New model suggests volcanoes fed by ‘mush’ reservoirs not molten magma chambers

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The amount of magma in the Long Valley Caldera, a Californian Super-volcano, is so large it could releases 140 cubic miles of material into the atmosphere during its next eruption

August 11, 2018   All
The amount of magma in the Long Valley Caldera, a Californian Super-volcano, is so large it could releases 140 cubic miles of material into the atmosphere during its next eruption

A SUPER-VOLCANO in California which erupted with devastating results hundreds of thousands of years ago has a vast reservoir of semi-molten magma measuring a staggering 240 cubic MILES, a new study has suggested. The amount of magma in the Long Valley Caldera is so large it could support an eruption equivalent to the massive one […]

The post The amount of magma in the Long Valley Caldera, a Californian Super-volcano, is so large it could releases 140 cubic miles of material into the atmosphere during its next eruption appeared first on STRANGE SOUNDS – AMAZING, WEIRD AND ODD PHENOMENA.


Source: The amount of magma in the Long Valley Caldera, a Californian Super-volcano, is so large it could releases 140 cubic miles of material into the atmosphere during its next eruption

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When magma prevents volcanic eruptions

December 3, 2017   All
When magma prevents volcanic eruptions

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Why does the floor of calderas lift disproportionately without erupting? Researchers from UNIGE and Roma Tre used thermal and experimental models to explain one of the least-understood processes in volcanology: 'Caldera resurgence' A spectacular proof of our…… Read more »

 
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Source: When magma prevents volcanic eruptions

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