Magnús T. Guðmundsson

Rapid UAV‐ and Ground‐Based Magnetic Mapping of Subsurface Fractures During a Volcano‐Tectonic Crisis in Grindavík, Iceland

E. J. Piispa, C.R. Gallagher, S. Bernholt, G. M. Einarsson et autres

Abstract We applied an integrated UAV‐ and ground‐based magnetometry workflow to map shallow subsurface fractures and cavities in the town of Grindavík during the 2023–2025 volcano‐tectonic crisis. Short‐wavelength linear and semi‐circular magnetic lows delineate open or partially open fractures and localized cavities, …

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Combining UAV SAR Tomography and Photogrammetry to study an Active Volcanic Vent in Iceland

A. V. Shevchenko, Eduardo de Freitas, Christian Wimmer, Egill Árni Guðnason et autres

Abstract. The recent volcanic unrest on Iceland's Reykjanes Peninsula was an excellent opportunity to better understand volcanic processes and develop hazard mitigation strategies. The eruption was studied using various direct and remote-sensing techniques. Here, we present an innovative UAV-based TomoSAR approach application, …

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Forecasting volcanic eruptions across scales

Magnús T. Guðmundsson, Christopher J. Bean

Predicting future volcanic eruptions requires better understanding of crustal magma storage.

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328PEvaluating patient and family satisfaction with multidisciplinary care in a national paediatric neuromuscular disease unit

J. Weichbrodt, Johan Lindqvist, J. Svensson, Magnús T. Guðmundsson et autres

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Fracture dynamics and topographic controls at Mount Thorbjörn during the Svartsengi 2023–2024 volcanic unrest, Iceland

María Hurley, Nicolas Oestreicher, A. V. Shevchenko, Gregory P. De Pascale et autres

Regions with complex topography experience varying degrees of deformation during volcano-tectonic events. Few studies have investigated the relationship between topography and fracturing in detail, and therefore insights into this interplay are limited. In this work, we analysed deformation patterns during the 2023–2024 …

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3D Model of the Shallow Crustal Density Distribution of the Krafla Volcanic System in Iceland

Ana Martinez‐Garcia, Joachim Gottsmann, James Wookey, A. Rust et autres

Abstract Krafla volcano, located in Iceland's North Volcanic Zone, has been extensively studied using static gravity surveys since 1975. This study integrates measurements acquired between 2022 and 2023 with legacy data to produce a new gravity map of the area. We produce …

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Heat from dyke intrusions released by boiling of warm groundwater and steaming into the atmosphere during the 1975–1984 eruptive and intrusive activity at Krafla, Iceland

Patricia Fehrentz, Magnús T. Guðmundsson, Hannah I. Reynolds, Anette K. Mortensen et autres

The Krafla volcano-tectonic episode in NE-Iceland in 1975–1984 was associated with approximately 10 m widening of the plate boundary within the Krafla caldera, where a high-temperature geothermal system is located. A composite dyke was formed, with an estimated volume 0.15–0.31 km 3 …

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Heat from Dyke Intrusions Released by Boiling of Warm Groundwater and Steaming into the Atmosphere During the 1975-1984 Eruptive and Intrusive Activity at Krafla, Iceland

Patricia Fehrentz, Magnús T. Guðmundsson, Hannah I. Reynolds, Anette K. Mortensen et autres

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CIEST support during the ongoing volcanic crisis on the Reykjanes Peninsula in south-west Iceland

Virginie Pinel, Joaquín M. C. Belart, Marcello de Michele, Daniel Raucoules et autres

International audience

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Morphological changes of the south-eastern wall of Askja caldera, Iceland over the past 80 years

A. V. Shevchenko, Thomas R. Walter, Magnús T. Guðmundsson, Joaquín M. C. Belart et autres

Abstract Calderas are subcircular depressions with near-vertical walls, which are often gravitationally unstable and prone to mass movements that sequentially widen their basins. However, the details of these erosional changes are difficult to decipher due to short observational periods. Here, we use …

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Internal structure of the volcanic island of Surtsey and surroundings: Constraints from a dense aeromagnetic survey

Sara Sayyadi, Magnús T. Guðmundsson, James D. L. White, Þorsteinn Jónsson et autres

Surtsey, a young basaltic island off the south coast of Iceland, was built by volcanic activity in 1963–1967 from a pre-eruption oceanic seafloor depth of 130 m. An aeromagnetic survey was carried out in October 2021 over a 60 km2 area covering …

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Interpreting seismicity and earthquake locations during the recent unrest on the Reykjanes Peninsula in SW-Iceland

Kristín Jónsdóttir, Halldór Geirsson, Benedikt Halldórsson, K. S. Vogfjörd et autres

The Reykjanes Peninsula in SW Iceland is transacted by a divergent plate boundary with oblique spreading. Volcanic unrest periods, marked by fissure eruptions widely across the peninsula, seem to occur with regular intervals, approximately every 800-1000 years. These volcanic unrest periods have …

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