The 2021 Fagradalsfjall eruption in Iceland was preceded by a period of tectonic stress release culminating in a decline in deformation and seismicity days before the eruption. High rates of deformation and seismicity occurred from February 24th to mid-March due to magma dyke emplacement, but these rates decreased as tectonic stress was released. Weaker crust near the surface may have also contributed to reduced seismicity. This highlights the need to consider the interaction between volcanoes and tectonic stress for eruption forecasting.
Publisher
Nature
Published On
Sep 14, 2022
Authors
Freysteinn Sigmundsson, Michelle Parks, Andrew Hooper, Halldór Geirsson, Kristín S. Vogfjörd, Vincent Drouin, Benedikt G. Ófeigsson, Sigrún Hreinsdóttir, Sigurlaug Hjaltadóttir, Kristín Jónsdóttir, Páll Einarsson, Sara Barsotti, Josef Horálek, Thorbjörg Ágústsdóttir
Tags
Fagradalsfjall eruption
tectonic stress
deformation
seismicity
magma dyke
volcanoes
eruption forecasting
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