Questions tagged [volcanic-eruption]
A volcanic eruption happens when magma reaches the surface, either effusively (as lava) or explosively (as tephra).
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How is felsic magma produced at subduction zones?
I previously believed that continental crust owes its lower density to the partial melting of oceanic crust; the mantle would partially melt at mid-ocean ridges to produce basaltic crust, and when ...
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Why is felsic (granitic) lava so much more viscous when flowing (or trying to) than mafic (basaltic) lava?
A lower average temperature is, apparently, only part of the answer....
Several sites said composition, not temperature, explains most of the difference...
And the difference in viscosity can be up to ...
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Volcanic Explosivity Index of Cumbre Vieja eruption
I have been following the last events of Cumbre Vieja eruption since it started last month. Trying to grasp some basic knowledge of volcanology I have seen the eruption is classified as VEI-3 in the ...
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How was the Mozambique Belt formed
I'm looking for some of the most comprehensive or significant articles on the Mozambique Belt in East Africa. If anyone can recommend some specific papers regarding the Geological history of the belt ...
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How common are volcanic-induced rain events?
Last year I did an online summer course on remote sensing of volcanoes held by the University of Hawaii at Hilo. During the course, we had a presentation about the monitoring campaign during the 2018 ...
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Bouvet Island volcano [closed]
In this remote island (the most remote!) there is a volcano that wikipedia report as inactive, but from google maps there seems to be some ash in the sky. Are there some ongoing eruption?
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Why aren't there ultra acid igneous rocks?
In my study, I found that in volcanoes when the magma is going up it formed different types of rocks. There are basic, acidic and ultrabasic.
My question is why isn't there ultra acid igneous rocks ...
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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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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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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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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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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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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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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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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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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 $\small\mathsf{CO_2}$ and a short term, but more intense ...
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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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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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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 ...
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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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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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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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What would be 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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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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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 ...
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