University of North Carolina, 3315 Mitchell Hall, Chapel Hill, NC 27599 United States ; Instituto Geofisico, Escuela Politecnica Nacional, Calle Ladron de Guevara s/n, Quito, 17-01-2759 Ecuador
University of North Carolina, 3315 Mitchell Hall, Chapel Hill, NC 27599 United States
U.S. Army Engineer Research and Development Center, U.S. Army ERDC-CRREL, 72 Lyme Rd., Hanover, NH 03755-1290