Elenora van Rijsingen, Ecole Normale Supérieure, Department of Geosciences, Paris, France, Eric Calais, Ecole Normale Supérieure Paris, Paris, France, Romain Jolivet, Ecole Normale Supérieure Paris, Département de Géosciences, Paris, France, Jean-Bernard de Chabalier, Université de Paris, Institut de Physique du Globe de Paris (IPGP), UMR 7154, Paris, France, Richard E.A. Robertson, University of the West Indies, Seismic Research Center, St. Augustine, Trinidad and Tobago and Graham Alexander Ryan, University of the West Indies, Kingston, Jamaica