Parks, M.M. orcid.org/0000-0002-1793-5633, Sigmundsson, F. orcid.org/0000-0001-9052-4665, Drouin, V. orcid.org/0000-0002-5340-0484 et al. (14 more authors) (2024) 2021–2023 Unrest and Geodetic Observations at Askja Volcano, Iceland. Geophysical Research Letters, 51 (4). e2023GL106730. ISSN 0094-8276
Abstract
Unrest began in July 2021 at Askja volcano in the Northern Volcanic Zone (NVZ) of Iceland. Its most recent eruption, in 1961, was predominantly effusive and produced ∼0.1 km3 lava field. The last plinian eruption at Askja occurred in 1875. Geodetic measurements between 1983 and 2021 detail subsidence of Askja, decaying in an exponential manner. At the end of July 2021, inflation was detected at Askja volcano, from GNSS observations and Sentinel-1 interferograms. The inflationary episode can be divided into two periods from the onset of inflation until September 2023. An initial period until 20 September 2021 when geodetic models suggest transfer of magma (or magmatic fluids) from within the shallowest part of the magmatic system (comprising an inflating and deflating source), potentially involving silicic magma. A following period when one source of pressure increase at shallow depth can explain the observations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | volcanic unrest; volcano geodesy; volcano monitoring; GNSS; InSAR; Askja volcano |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Mar 2024 16:08 |
Last Modified: | 01 Mar 2024 16:08 |
Status: | Published |
Publisher: | American Geophysical Union (AGU) |
Identification Number: | 10.1029/2023gl106730 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:209779 |