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Hekla Volcano, Iceland, in the 20th Century: Lava Volumes, Production Rates, and Effusion Rates

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Pedersen, Gro
dc.contributor.author Belart, Joaquín M. C.
dc.contributor.author Magnússon, Eyjólfur
dc.contributor.author Vilmundardóttir, Olga Kolbrún
dc.contributor.author Kizel, Fadi
dc.contributor.author Sigurmundsson, Friðþór Sófus
dc.contributor.author Gísladóttir, Guðrún
dc.contributor.author Benediktsson, Jon Atli
dc.date.accessioned 2019-01-10T10:43:26Z
dc.date.available 2019-01-10T10:43:26Z
dc.date.issued 2018-02-22
dc.identifier.citation Pedersen, G. B. M., Belart, J. M. C., Magnússon, E., Vilmundardóttir, O. K., Kizel, F., Sigurmundsson, F. S., . . . Benediktsson, J. A. (2018). Hekla Volcano, Iceland, in the 20th Century: Lava Volumes, Production Rates, and Effusion Rates. Geophysical Research Letters, 45(4), 1805-1813. doi:doi:10.1002/2017GL076887
dc.identifier.issn 0094-8276
dc.identifier.issn 1944-8007 (eISSN)
dc.identifier.uri https://hdl.handle.net/20.500.11815/967
dc.description Publisher's version (útgefin grein)
dc.description.abstract Lava flow thicknesses, volumes, and effusion rates provide essential information for understanding the behavior of eruptions and their associated deformation signals. Preeruption and posteruption elevation models were generated from historical stereo photographs to produce the lava flow thickness maps for the last five eruptions at Hekla volcano, Iceland. These results provide precise estimation of lava bulk volumes: V1947–1948 = 0.742 ± 0.138 km3, V1970 = 0.205 ± 0.012 km3, V1980–1981 = 0.169 ± 0.016 km3, V1991 = 0.241 ± 0.019 km3, and V2000 = 0.095 ± 0.005 km3 and reveal variable production rate through the 20th century. These new volumes improve the linear correlation between erupted volume and coeruption tilt change, indicating that tilt may be used to determine eruption volume. During eruptions the active vents migrate 325–480 m downhill, suggesting rough excess pressures of 8–12 MPa and that the gradient of this excess pressure increases from 0.4 to 11 Pa s−1 during the 20th century. We suggest that this is related to increased resistance along the eruptive conduit.
dc.description.sponsorship Icelandic Research Fund. Grant Number: 152266‐052
dc.format.extent 1805-1813
dc.language.iso en
dc.publisher American Geophysical Union (AGU)
dc.relation.ispartofseries Geophysical Research Letters;45(4)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Lava volumes
dc.subject Production rates
dc.subject Effusion rates
dc.subject Stereo photogrammetry
dc.subject High‐resolution digital elevation models
dc.subject Hekla
dc.subject Eldfjöll
dc.subject Hraun
dc.subject Eldgos
dc.subject Hraunrennsli
dc.subject Loftmyndir
dc.subject Kortagerð
dc.subject Fjarkönnun
dc.title Hekla Volcano, Iceland, in the 20th Century: Lava Volumes, Production Rates, and Effusion Rates
dc.type info:eu-repo/semantics/article
dcterms.license This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
dc.description.version Peer Reviewed
dc.identifier.journal Geophysical Research Letters
dc.identifier.doi 10.1002/2017GL076887
dc.contributor.department Jarðvísindastofnun (HÍ)
dc.contributor.department Institute of Earth Sciences (UI)
dc.contributor.department Líf- og umhverfisvísindastofnun (HÍ)
dc.contributor.department Institute of Life and Environmental Sciences (UI)
dc.contributor.department Rafmagns- og tölvuverkfræðideild (HÍ)
dc.contributor.department Faculty of Electrical and Computer Engineering (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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