Grímsvötn Volcano Update; Alert Level Raised, Possible Glacial Flood

While we await a potential new eruption northeast of Grindavik, the alert level was raised at a volcano in a separate area of the country. As, on January 4th, the alert level of the Grímsvötn volcano was raised from green to yellow in response to a swarm of earthquakes. These earthquakes might be caused by or occurring alongside a glacial flood known as a jökulhlaup.

Thumbnail Photo Credit: This work "Laki23", is a derivative of a photo (resized, cropped, image brightness increased, image saturation increased, text overlay, overlaid with GeologyHub made graphics (the image border & the GeologyHub logo)) from "Lakagigar", by: Manu, emmanueleragne, 2014, Posted on Flickr, Flickr account link: https://www.flickr.com/photos/emmanueleragne/, Photo link: https://www.flickr.com/photos/emmanueleragne/15073466347/, CC BY 2.0. "Laki23" is used & licensed under CC BY 2.0 by Youtube.com/GeologyHub

Note: Laki is a vent of the Grímsvötn volcano which formed during an eruption between 1783 and 1784.

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Sources/Citations:
[1] Vedur.is / Iceland Met Office
[2] VEIs, dates/years, composition, tephra layer name, DRE estimates, and bulk tephra volume estimates for volcanic eruptions shown in this video which were assigned a VEI 4 or larger are sourced from the LaMEVE database (British Geological Survey © UKRI), https://www2.bgs.ac.uk/vogripa/view/controller.cfc?method=lameve, Used with Permission
[3] Source of Volcanic Explosivity Index (VEI) methodology and criteria: Newhall, C. G., and Self, S. (1982), The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism, J. Geophys. Res., 87(C2), 1231–1238, doi:10.1029/JC087iC02p01231. Accessed / Read by Youtube.com/GeologyHub on Oct 5th, 2022.

0:00 Earthquake Swarm
0:26 Alert Level Raised
1:38 Glacial Floods
3:54 Analysis

Тэги:

#Grimsvotn #Iceland #Volcano_Eruption #Volcano #Iceland_Volcano #Iceland_Eruption #Eruption #Volcano_Iceland #Glacial_Flood #Geology

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