Počet záznamů: 1
Cyclical geothermal unrest as a precursor to Iceland’s 2021 Fagradalsfjall eruption
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SYSNO ASEP 0557212 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Cyclical geothermal unrest as a precursor to Iceland’s 2021 Fagradalsfjall eruption Tvůrce(i) Flóvenz, Ó. G. (IS)
Wang, R. (CN)
Hersir, G. P. (IS)
Dahm, T. (DE)
Hainzl, S. (DE)
Vassileva, M. (DE)
Drouin, V. (IS)
Heimann, S. (DE)
Isken, M. P. (DE)
Gudnason, E. Á. (IS)
Ágústsson, K. (IS)
Ágústsdóttir, T. (IS)
Horálek, Josef (GFU-E) ORCID, RID
Motagh, M. (DE)
Walter, T. R. (DE)
Rivalta, A. (DE)
Jousset, P. (FR)
Krawczyk, C. M. (DE)
Milkereit, C. (DE)Zdroj.dok. Nature Geoscience. - : Nature Publishing Group - ISSN 1752-0894
Roč. 15, May (2022), s. 397-404Poč.str. 8 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova surface deformation ; Reykjanes peninsula ; earthquakes Vědní obor RIV DC - Seismologie, vulkanologie a struktura Země Obor OECD Volcanology Způsob publikování Open access Institucionální podpora GFU-E - RVO:67985530 UT WOS 000789729500001 EID SCOPUS 85129252410 DOI 10.1038/s41561-022-00930-5 Anotace Understanding and constraining the source of geodetic deformation in volcanic areas is an important component of hazard assessment. Here, we analyse deformation and seismicity for one year before the March 2021 Fagradalsfjall eruption in Iceland. We generate a high-resolution catalogue of 39,500 earthquakes using optical cable recordings and develop a poroelastic model to describe three pre-eruptional uplift and subsidence cycles at the Svartsengi geothermal field, 8 km west of the eruption site. We find the observed deformation is best explained by cyclic intrusions into a permeable aquifer by a fluid injected at 4 km depth below the geothermal field, with a total volume of 0.11 +/- 0.05 km(3) and a density of 850 +/- 350 kg m(-3). We therefore suggest that ingression of magmatic CO2 can explain the geodetic, gravity and seismic data, although some contribution of magma cannot be excluded. Ingression of magmatic gas into a geothermal aquifer generated cyclical deformation and primed the system for the 2021 Fagradalsfjall eruption, Iceland, according to a catalogue of 39,500 precursory earthquakes combined with a poroelastic model. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2023 Elektronická adresa https://www.nature.com/articles/s41561-022-00930-5
Počet záznamů: 1