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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In a volcanic eruption, can the altitude of the SO2 emission be higher than the ash column?
In the recent volcanic eruptions in South-East Asia, the height/altitude of the ash column is easily available. However, when I tried to simulate/"hindcast" the track of the $SO_2$ emissions ...
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How powerful was Arizona's Sunset Crater eruption?
In around 1100 CE, maybe 20 miles from Flagstaff, AZ, Sunset Crater erupted.
My question is... how powerful was this eruption? Like where on the VEI scale would it have likely fallen?
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Which volcano is more hazardous? Mount Rainier or Mount Hood?
It is my understanding that Mount Rainier, despite its looming size, is a fairly quiet volcano. An eruption would mean lahars and mud flows, but would not be an explosive eruption like Mt Saint Helens ...
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How come the pressure/shock waves of an explosive volcanic eruption almost always fail to cause any damage?
(Please read the text thoroughly before giving an answer) A big explosive eruption goes off with the energy of hundreds or thousands of nuclear weapons combined. It would be expected that the massive ...
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How do you determine if basalt originates from a mid-oceanic ridge or from a continental flow?
How do we distinguish basalt which formed in an oceanic-floor flow from basalt formed in a terrestrial flow using large-scale observations?
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In which conditions ignimbrites devitrifies?
Devitrification is the crystallization of volcanic glass to crystals. Obsidian groundmass -black in color- turns to white with devitrification.
I want to learn why devitrification takes place.
...
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How long does a stratovolcano live?
Will it live for several million years?
Is 3-4 millions years normal?
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How have Icelandic geologists determined the position and length of the magma under Grindavík?
The Iceland Met Office website has a status page at https://en.vedur.is/about-imo/news/a-seismic-swarm-started-north-of-grindavik-last-night
It has mentioned using models to determine the location and ...
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How to model the travel time of tsunami waves generated by volcanic explosion?
I am trying to understand how can I model the travel time of tsunami waves generated by volcanic explosions? I want to analyze the 2022 Tonga tsunami. I have been using the UNESCO CoMIT software with ...
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Causal relationship between the simultaneous eruptions of Mauna Loa and Kīlauea? Does one cause the other or perhaps a third phenomenon cause both?
The CBS News' headline Two volcanoes erupt simultaneously in Hawaii for first time in decades: "A very sacred event that we are watching" suggests that simultaneous eruptions from these two ...
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Can people on the side of a volcano survive the eruption?
Imagine a couple of people are at the side of a huge volcano, halfway to the summit, when it erupts. There's an opening to the Chambers right beside them.
Fire belched from its riven summit. The ...
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How is felsic magma produced at island arcs?
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 ...
