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Questions tagged [volcanic-eruption]

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1answer
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How far a andesitic lava can flow and what is the speed?

For an effusive volcanic activity how far a andesitic lava can flow? What is the speed? Eruption amout 0.2 cubic km amount with 25 degree slope.
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1answer
82 views

What is the largest earthquake attributable solely to volcanic activity

I was recently and for the first time caught in an earthquake. This being my first time, I freaked out and had no idea whether the building was going to collapse or not. I was later told that this ...
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2answers
57 views

Subrelluric forces in a volcanic eruption

I am listening to a song about volcanoes. It is called "Pyroclastic Annihilation" performed by a brutal deth/thrash metal band called "Demolition Hammer". It is from their album "Epidemic of Violence" ...
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0answers
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Can a cryovolcanic eruption be as powerful as a normal volcanic eruption?

The most powerful volcanic eruption in recorded history was the 1815 eruption of Mount Tambora, an explosion equivalent to 33 billion tons of TNT. Is there any way a cryovolcanic eruption could be as ...
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1answer
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Eruptive fissures in Hawaii associated with Kilauea; what are they? What is really happening?

I hear news of "eruptive lava fissures" opening up in Hawaii, nine of them at last count. But I don't understand what these are really. Are these existing, older lava tubes that are suddenly opening ...
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3answers
488 views

What is meant by intraplate volcanism?

I am having massive confusion on whether intraplate volcanism refers to volcanism occurring at plate boundaries or away from plate boundaries (such as formation of ocean island basalts), or perhaps ...
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0answers
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Would a volcanic winter trigger an oceanic “spring”?

There is large amounts of observations supporting the effects of volcanic eruptions on climate: A long term subtle warming effect due to $CO_2$ and a short term, but more intense cooling effect due ...
3
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1answer
405 views

Would a Yellowstone eruption destroy global agriculture?

Someone recently claimed in my hearing that if the Yellowstone caldera were to erupt, the resulting ash cloud would end all agriculture for a year or two. (The speaker is not a scientist, and neither ...
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1answer
60 views

What is this rock found close to active volcano

Scratches glass Not affected by sandpaper on the bottom Depending on lighting, intense light, triangles everywhere Violet/light purple fluorescence
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1answer
71 views

What causes lava eruptions (and shutoffs)?

I understand the process of volcanism and the reason for magma deposition on the surface of the earth. What is not clear to me, or what seems to be less well explained is why eruptions occur and then ...
3
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2answers
155 views

How does 10mm/yr of plate subduction provide enough material to create eruptions?

If the convergent boundary is only consuming 10mm of oceanic crust per year, it "seems" like that would provide insufficient material to cause the level of eruption generally observed. I am making the ...
7
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1answer
93 views

Is there a 'standard size' for volcanic eruptions in terms of gas output?

We saw recently the Iceland volcano Eyjafjallajökull produced significant gaseous output that impacted the flight paths of several planes. When we look at volcanic gas components, we see they ...
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1answer
988 views

Can climate change cause earthquakes, tsunamis, or volcanic eruptions?

Different scientists have brought forth a theory that climate change can cause earthquakes, tsunamis and volcanic eruptions. For example: Professor Bill McGuire of University College London in his ...
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2answers
872 views

What precursor geological activity occurred prior to the Parícutin Volcano eruption in 1943?

Parícutin Volcano, sometimes referred to as the 'A Volcano Born in a Mexican Cornfield' (which is also the title of a book published in 1993, more information here), was one of the most well ...
7
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1answer
219 views

What would the precursors to a repeated Lake Toba super eruption?

Lake Toba, Indonesia is a supervolcano which was the site of a massive supervolcanic eruption estimated at VEI 8 that occurred 69,000 to 77,000 years ago, representing a climate-changing event. It ...
13
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1answer
433 views

Why would volcano eruption cause cardiac arrest?

Following recent eruption of Mt Ontake and the sad news of over 30 people found in 'cardiac arrest', why would the eruption cause it? My initial thought would be that the cause of death would ...
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1answer
613 views

Why did the Laki eruption of 1783 produce so much fluorine?

The Laki fissure eruption of 1783/4 in Iceland was not particularly large or explosive, but it is infamous for the large quantities of fluorine (or hydrofluoric acid) and SO2 that it produced, and the ...