Pacific Geoscience Centre, Geological Survey of Canada, 9860 West Saanich Road, P.O. Box 6000, Sidney, BC V8L 4B2 Canada ; National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba, 305-0006 Japan
Pacific Geoscience Centre, Geological Survey of Canada, 9860 West Saanich Road, P.O. Box 6000, Sidney, BC V8L 4B2 Canada
National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba, 305-0006 Japan