Juan Felipe Paniagua-Arroyave, Universidad EAFIT, Departamento de Ciencias de la Tierra, Medellin, Colombia, Arnoldo Valle-Levinson, University of Florida, Department of Civil and Coastal Engineering, Ft Walton Beach, FL, United States, Sabrina Marie Parra, US Naval Research Laboratory, Washington, DC, United States and Peter N Adams, University of Florida, Department of Geological Sciences, Gainesville, FL, United States