| Affiliation: | Institute of Theoretical Geophysics, University of Cambridge, Downing Street, Cambridge CB2 3EQ,;UK Department of Geological Sciences, University of Durham, South Road, Durham DH1 3LE,;UK. E-mail: US Geological Survey, 345;Middlefield Road, Menlo Park, CA 94025, USA Department of Geological and Geophysical Sciences, Guyot Hall, Princeton University, Princeton, NJ 08544-5807,;USA Meteorological Office of Iceland, Bustadavegi 9,;Reykjavik, Iceland National Energy Authority, Grensasvegi 9,;Reykjavik, Iceland |
