1. Department of Earth and Environmental Sciences Dalhousie University Halifax Nova Scotia Canada
2. Department of Geology and Environmental Science University of Pittsburgh Pittsburgh PA USA
3. Department of Geological Science Stanford University Stanford CA USA
4. Geological Survey of Canada Dartmouth Nova Scotia Canada
5. Earth, Environmental and Geographic Sciences University of British Columbia Okanagan Kelowna British Columbia Canada
6. Institute of Seismology, Department of Geosciences and Geography University of Helsinki Helsinki Finland