Physics Department, University of Connecticut, 2152 Hillside Road, Storrs, CT 06269- 3046, United States
Center for Integrative Geosciences, University of Connecticut, 354 Mansfield Road, Storrs, CT 06269-2045, United States
Center for Integrative Geosciences, University of Connecticut, 354 Mansfield Road, Storrs, CT 06269-2045, United States ; Physics Department, University of Connecticut, 2152 Hillside Road, Storrs, CT 06269- 3046, United States
Weston Geophysical Corporation, 181 Bedford Street, Lexington, MA 02420, United States