Now, cracks in the ground have been photographed southwest of Reykjavik, Iceland.
The team of Warm Arctic, an icelandic company spezializing in geothermal reservoir engineering, has pictured dozens of cracks in the ground, where an earthquake swarm is currently hitting the Reykjanes Peninsula…
The present geological context and history
Experts believe a volcanic eruption could take place in the Reykjanes Peninsula.
A large volume of magma is accumulating in this area of Iceland since about a year, causing the soil to lift by several centimeters and triggering numerous seismic swarms, getting always stronger.
Since February 24, the situation has completely degenerated. Over 22,000 earthquakes have been recorded… Volcanic tremors too, prompting officials to raise the alert level of the Krysuvik volcano from green to orange overnight.
Yesterday, a M5.7 and 6 M4is hit the region within the same hour… InSAR reveals ongoing dike formation in Fagradalsfjall on the Reykjanes peninsula.
Successive InSAR data of the Iceland crisis. The first includes the M5.7 earthquake, a few other offsets, and clear dike deformation, the second indicates dike migration to the southwest and shows the surface rupture of the M5 event last night (S1, desc., by Adriano) @ESA_EO pic.twitter.com/XHu4OHeTo0
— Sigurjón (Sjonni) Jónsson (@Sjonni_KAUST) March 7, 2021
Now, cracks have been found in the Thorbjorn area, a small volcanic building formed during a single eruptive event that took place around 24,000 years ago. That exact same volcano made the headlines last year because it was the center of the first crustal deformations (caused rising magma).
Interesting low frequency earthquake. The long LF coda indicates movement of volcanic fluids. As magma ascends, moving toward the surface, gases build pressure within the magma, forcing cracks and dikes to open and expand through the overlying rocks.#icelandquakes #Iceland pic.twitter.com/htpGT1rLWr
— iikka lehtinen (@ilel100) March 7, 2021
These fractures were observed near the Blue Lagoon, a geothermal area and one of Iceland’s most visited tourist attractions. Its water comes from the nearby Svartsengi geothermal plant, or better said, the volcanic system located west of Krysuvik.
Surface cracks everywhere! Gunnar Grímsson and colleagues were in the field southwest of Reykjavík yesterday for drone imaging. Here is one of their shots. pic.twitter.com/9B8amozZwG
— Sigurjón (Sjonni) Jónsson (@Sjonni_KAUST) March 8, 2021
Thorbjorn and Krysuvik haven’t erupted for centuries. So there’s lot of magma ready to blow and flow!
Meanwhile some argue the volcanoes will not erupt:
When seismic tremor indicates magma is moving, concern about an #eruption is understandable.
Pro tip. Most of the spreading in Iceland occurs underground ? pic.twitter.com/Wq6IIbhevo
— Dave McGarvie (@subglacial) March 7, 2021
What’s your opinion?
Did you know that giant cracks are also fissuring the desert of Arizona?
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