Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Dr., PO Box 757320, Fairbanks, AK 99775-7320 United States
Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Dr., PO Box 757320, Fairbanks, AK 99775-7320 United States
Department of Earth and Planetary, University of California Berkeley, College of Letters and Science, 307 Mc Cone Hall, Berkeley, CA 94720-4767 United States