- Magma movement at the roots of the Askja volcano, Iceland, indicated by lower-crustal seismicitySoosalu, Heidi Elisabet; White, R.S.; Key, J.; Einarsson, Pall; Jakobsdottir, Steinunn S.International Association of Volcanology and Chemistry of Earth's Interior : General Assembly : Reykjavik, Iceland, 18-22 August, 20082008 / ? p