Robert A. Askew

The Destabilizing Effect of Glacial Unloading on a Large Volcanic Slope Instability in Southeast Iceland

Daniel Ben‐Yehoshua, Sigurður Erlingsson, Þorsteinn Sæmundsson, Reginald L. Hermanns et autres

Since the turn of the 20th century, glacial thinning has been exposing volcanic mountain slopes around Iceland’s outlet glaciers. In the early 2000s, several slope instabilities appeared around the Svínafellsjökull outlet glacier in Southeast Iceland. The largest of these is located on …

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A lower bound on the rheological evolution of magma in the 2021 Fagradalsfjall Fires

Arianna Soldati, Donald Bruce Dingwell, Thor Thordarson, Ármann Höskuldsson et autres

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Assessing the mean output rate (MOR) of past effusive basaltic eruptions - a look at the postglacial volcanism of the Reykjanes Peninsula in Iceland

Birgir V. Óskarsson, Robert A. Askew, Halldór S. Guðmundsson

Volcanological approaches for assessing the effusion rate of past effusive volcanism are of great importance, to enable proper evaluation of the eruption magnitude and past tectono-magmatic conditions which are relevant for mitigating future volcanism. The reactivation of volcanism on the Reykjanes peninsula …

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Volume, effusion rates and lava hazards of the 2021, 2022 and 2023 Reykjanes fires: Lessons learned from near real-time photogrammetric monitoring

Gro B. M. Pedersen, Joaquín M. C. Belart, Birgir V. Óskarsson, Sydney R. Gunnarson et autres

At the time of writing (January 9, 2024) four basaltic effusive eruptions have taken place on the Reykjanes Peninsula, SW Iceland since 2021. This includes three eruptions within the Fagradalsfjall volcanic system (March 19–September 18, 2021; August 3–21, 2022 and July 10–August …

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Years of deep magmatic upheaval preceding the 2021 eruption at Fagradalsfjall, Iceland

Maren Kahl, Euan Mutch, John Maclennan, Daniel J. Morgan et autres

Effective eruption forecasting and volcanic hazard management depend heavily on our ability to detect when a volcanic system switches from a state of unrest into a state of eruption. The 2021 eruption at Fagradalsfjall in SW Iceland, the first deep-sourced eruption on …

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Temporal and spatial evolution of the Neogene age Breiðdalur central volcano through 39Ar/40Ar and U-Pb age determination

Robert A. Askew, Thor Thordarson, Phil B. Gans, Jay M. Thompson et autres

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Breiðdalur Central Volcano. What came first: the central volcano or the fissure swarm?

Robert A. Askew

The Breiðdalur volcanic system, eastern Iceland, comprises of a ~600 km3 central volcano, a 30 - 40 km long dyke swarm and plateau basalts erupted from this dyke swarm. The entire volcanic system was active from 10.1 to 7.8 Ma, the central …

Ground-Based Measurements of the 2014–2015 Holuhraun Volcanic Cloud (Iceland)

Melissa Anne Pfeffer, Baldur Bergsson, Sara Barsotti, Gerður Stefánsdóttir et autres

The 2014–2015 Bárðarbunga fissure eruption at Holuhraun in central Iceland was distinguished by the high emission of gases, in total 9.6 Mt SO2, with almost no tephra. This work collates all ground-based measurements of this extraordinary eruption cloud made under particularly challenging …

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Lava field evolution and emplacement dynamics of the 2014–2015 basaltic fissure eruption at Holuhraun, Iceland

Gro B. M. Pedersen, Ármann Höskuldsson, Tobias Dürig, Thor Thordarson et autres

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Middle Miocene rifting and volcanic history of the Berufjordor- Breiddalur region, eastern Iceland revealed by 40Ar/39Ar geochronology

Phillip B. Gans, Robert A. Askew, Thor Thordarson

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Emplacement and Growth of the August 2014 to February 2015 Nornahraun Lava Flow Field North Iceland

Thor Thordarson, Ármann Höskuldsson, Ingibjörg Svala Jónsdóttir, Gro B. M. Pedersen et autres

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Ground-based measurements of the emission rate and composition of gases from the Holuhraun eruption

Melissa Anne Pfeffer, Gerður Stefánsdóttir, Baldur Bergsson, Sara Barsotti et autres