1. Departments of Physics and Ocean, Earth, and Atmospheric Sciences, Old Dominion University, Norfolk, VA, USA
2. Department of Geology and Environmental Science, James Madison University, Harrisonburg, VA, USA
3. Department of Geosciences, Williams College, Williamstown, MA, USA
4. Department of Curriculum and Instruction, University of Arkansas, Fayetteville, AR, USA
5. Department of Physics, Old Dominion University, Norfolk, VA, USA