1. Pacific Geoscience Centre, Geological Survey of Canada, P.O. Box 6000, Sidney, British Columbia, Canada V8L 4B2, earl.davis@canada.ca
2. Ocean Networks Canada, University of Victoria, 2474 Arbutus Road, Victoria, British Columbia, Canada V8N 1V9
3. RBR Ltd., 95 Hines Road, Ottawa, Ontario, Canada 2K 2M5
4. Paroscientific, Inc. and Quartz Seismic Sensors, Inc., 4500 148th Avenue NE, Redmond, Washington 98052