FS
Member Since 1988
Freysteinn Sigmundsson
Research scientist, Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland
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2021–2023 Unrest and Geodetic Observations at Askja Volcano, Iceland
GEOPHYSICAL RESEARCH LETTERS
16 february 2024
Michelle Parks, Freysteinn Sigmundsson, Vincent Dr...
Unrest began in July 2021 at Askja volcano in the Northern Volcanic Zone (NVZ) of Iceland. Its most recent eruption, in 1961, was predominantly eff...
Estimating Deformation Source Parameters using a 3D Elastic Finite Element Model including Topography and Crustal Heterogeneity at Askja, Iceland.
GLOBAL APPLICATIONS OF VOLCANO GEODESY IV ELIGHTNING
geodesy | 14 december 2023
Catherine O'Hara, Sonja Heidi Maria Greiner, Halld...
Surface deformation can be used to investigate subsurface processes at active volcanoes. The use of forward and inverse modeling, by constraining defo...
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The 4th Diking Event of the Fagradalsfjall Rifting Episode (2021-?) in July 2023: Geodetic and Seismic Imaging of the Dike Propagation and Effects of Imposed Stresses on the Dike and the Associated Eruption
GEOPHYSICAL IMAGING OF MAGMA STORAGE AND TRANSPORT AT VOLCANOES IV ELIGHTNING
volcanology, geochemistry and petrology | 14 december 2023
Freysteinn Sigmundsson, Michelle Parks, Halldor Ge...
A dense swarm of small earthquakes began on 4 July 2023 in the vicinity of Fagradalsfjall, SW-Iceland, indicative of a new dike intrusion. Seismicity ...
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Ground deformation at Askja Volcano: a poroelastic finite element model to explain the observed uplift that commenced in the summer of 2021
GLOBAL APPLICATIONS OF VOLCANO GEODESY IV ELIGHTNING
geodesy | 14 december 2023
Josefa Sepulveda, Andrew J. Hooper, Susanna K. Ebm...
Askja Volcano in Iceland hosts multiple calderas, the youngest of which formed following the explosive 1875 eruption. Since the most recent eruption i...
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Reykjanes Peninsula Unrest and Fagradalsfjall Fires 2020-2023, Iceland: Deformation History of a Multi-Event Rifting Episode in a Trans-Tensional Environment
GLOBAL APPLICATIONS OF VOLCANO GEODESY I ORAL
geodesy | 14 december 2023
Halldor Geirsson, Michelle Parks, Chiara Lanzi, As...
There are only a few places on Earth where different modes of strain release can be observed at rift systems. The 2021-2023 eruptions at Fagradalsfjal...
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Decades of deflation of the Askja volcano, Iceland, prior to ongoing inflation
GEOPHYSICAL IMAGING OF MAGMA STORAGE AND TRANSPORT AT VOLCANOES II ORAL
volcanology, geochemistry and petrology | 13 december 2023
Erik C. Sturkell, Freysteinn Sigmundsson, Michelle...
The Askja volcano in Iceland is located at the subaerial part of the North American Eurasian plate boundary. The activity is dominated by basaltic er...
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Laboratory modelling of magma-fault interactions
EVOLUTION OF TRANSCRUSTAL MAGMA PLUMBING SYSTEMS, VOLCANIC UNREST, AND ERUPTION STYLES: CHEMICAL, PHYSICAL, AND TEMPORAL PERSPECTIVES IV ORAL
volcanology, geochemistry and petrology | 12 december 2023
Sonja Heidi Maria Greiner, Olivier Galland, Freyst...
Volcanic activity commonly occurs in crustal domains affected by tectonic structures, such as faults. We study the effects of faults on magma transpor...
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Geodesy for improved understanding of the interaction of magmatic processes, plate movements, and effects of climate change on the solid Earth
WILLIAM BOWIE LECTURE
geodesy | 12 december 2023
Freysteinn Sigmundsson
Geodetic measurements and models have advanced the understanding of how magmatic processes, plate movements and effects of climate change on the solid...
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