1. School of Ocean and Earth Science and Technology; University of Hawaii; 1680 East-West Road, Honolulu Hawaii 96822 USA
2. Center for Earthquake Research and Information; University of Memphis; 3876 Central Ave Ste 1, Memphis Tennessee 38152 USA
3. RepsolYPF; 1330 Lake Robbins Drive, The Woodlands Texas 77380 USA
4. Instituto Geográfico Militar Argentina; Cabildo 381, Buenos Aires Argentina
5. Instituto Geográfico Militar Chile; Dieciocho N° 369, Santiago Chile
6. Instituto Nacional de Prevención Sísmica; Roger Balet Norte 47, 5400 San Juan Argentina