- Waveforms of lower-crustal earthquakes near the Askja volcano at the North Iceland divergent plate boundarySoosalu, Heidi Elisabet; White, Robert S.; Knox, Clare; Einarsson, Pall; Jakobsdottir, Steinunn S."Hot and cold : seismicity associated with geothermal areas and ice-covered volcanoes" : ESC Working Group "Earthquakes and volcanoes" : Annual Workshop 2007 : Nesbud, September 9-162007 / p. [20]