Opin vísindi

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

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


Title: Hekla Volcano, Iceland, in the 20th Century: Lava Volumes, Production Rates, and Effusion Rates
Author: Pedersen, Gro   orcid.org/0000-0002-1626-0822
Belart, Joaquín M. C.   orcid.org/0000-0002-0853-8935
Magnússon, Eyjólfur
Vilmundardóttir, Olga Kolbrún   orcid.org/0000-0002-6555-9214
Kizel, Fadi   orcid.org/0000-0002-0821-296X
Sigurmundsson, Friðþór Sófus
Gísladóttir, Guðrún   orcid.org/0000-0002-4309-2414
Benediktsson, Jon Atli   orcid.org/0000-0003-0621-9647
Date: 2018-02-22
Language: English
Scope: 1805-1813
University/Institute: Háskóli Íslands
University of Iceland
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Department: Jarðvísindastofnun (HÍ)
Institute of Earth Sciences (UI)
Líf- og umhverfisvísindastofnun (HÍ)
Institute of Life and Environmental Sciences (UI)
Rafmagns- og tölvuverkfræðideild (HÍ)
Faculty of Electrical and Computer Engineering (UI)
Series: Geophysical Research Letters;45(4)
ISSN: 0094-8276
1944-8007 (eISSN)
DOI: 10.1002/2017GL076887
Subject: Lava volumes; Production rates; Effusion rates; Stereo photogrammetry; High‐resolution digital elevation models; Hekla; Eldfjöll; Hraun; Eldgos; Hraunrennsli; Loftmyndir; Kortagerð; Fjarkönnun
URI: https://hdl.handle.net/20.500.11815/967

Show full item record

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

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.

Description:

Publisher's version (útgefin grein)

Rights:

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.

Files in this item

This item appears in the following Collection(s)


Browse

About

My Account