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Questions tagged [volcanic-eruption]

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What are phyical properties of the adakitic melts?

I want to learn the physical properties (viscosity, temperature, volatile content) of adakitic melts. Which describes the type of the volcanic activity that caused by adakitic melts, effusive or ...
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110 views

How much did the worst volcanic eruption in human history affect global temperature?

According to this, 2018’s Biggest Volcanic Eruption of Sulfur Dioxide In extreme cases, like the 1991 eruption of Mount Pinatubo in the Philippines, these tiny aerosol particles can scatter so ...
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67 views

Fissure eruption

Can fissure eruptions dislocate/deform ( fault, rotate, bend, folding) the surrounding strata which fissure ascending into. Or, can a laccolith reach to the surface (and flow) after folding the ...
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Should I perform EOF analysis on an unevenly-spaced time series?

I have a dataset of sample concentrations of several ions/elements (Ca 2+, SO4 2-, K +, S, Ca, V, etc.) from an ice core which I am using to detect volcanic eruptions. The raw version of the dataset ...
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Coral Reef and Volcanic Islands

I have two questions regarding coral reef and volcanic islands. When a new volcanic island is formed, how much time generaly passes before a coral reef starts to form around the island? Another ...
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1answer
45 views

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
97 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
64 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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62 views

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
198 views

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
614 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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1answer
153 views

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 $\ce{CO_2}$ and a short term, but more intense cooling effect ...
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447 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
62 views

What is this rock found close to active volcano [closed]

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
73 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 ...
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2answers
164 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
150 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
1k 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
929 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 ...
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1answer
221 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 ...
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447 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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641 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 ...