Institution: | Earth and Space Sciences, UCLA, 5690 Geology Bldg., Los Angeles, CA 90095-1567, USA. E-mail:;Department of Physics, University of Alberta, Edmonton, AB T6G 1V6, Canada;Physics Division, US Coast Guard Academy, New London, CT 06320, USA;Max Planck Institute for Solar System Research, 37191 Katlenburg-Lindau, Germany |