1. Institute for Geophysics; University of Texas at Austin; Austin; Texas; USA
2. Department of Marine Sciences; Texas A&M University at Galveston; Galveston; Texas; USA
3. Department of Geo/Physical Sciences; Fitchburg State College; Fitchburg; Massachusetts; USA
4. Department of Geological Sciences; East Carolina University; Greenville; North Carolina; USA
5. Department of Geosciences; University of Massachusetts at Amherst; Amherst; Massachusetts; USA