Dep. Sismologia, Instituto de Geofisica, UNAM, Av. Universidad, 3000, Copilco, Del. Coyoacan, Mexico, DF 04510, Mexico
Dep. de Sismologie Institut de Physique du Globe de Paris, Boite 89 - 4 place Jussieu, Paris, 75252, France
Department of Aerospace Engineering Sciences, University of Colorado, UCB 429, Boulder, CO 80309, United States
Dep. Sismologia, Instituto de Geofisica, UNAM, Av. Universidad, 3000, Copilco, Del. Coyoacan, Mexico, DF 04510, Mexico
Dep. Sismologia, Instituto de Geofisica, UNAM, Av. Universidad, 3000, Copilco, Del. Coyoacan, Mexico, DF 04510, Mexico
Dep. Sismologia, Instituto de Geofisica, UNAM, Av. Universidad, 3000, Copilco, Del. Coyoacan, Mexico, DF 04510, Mexico
Seismological Laboratory, California Institute of Technology, 1200 E. California Blvd., MS 252-21, So. Mudd Building, Pasadena, CA 91125, United States