Earthquake Engineering Research Institute
Learning From Earthquakes

GEER Report Version 2

October 27, 2017

Summary:

An intraslab subduction zone earthquake of moment magnitude 7.1 occurred on September 19, 2017 approximately 60 km southwest of Puebla, Mexico, and 120 km southeast of Mexico City, Mexico. Following the event, a joint geotechnical engineering reconnaissance effort was organized between the Universidad Nacional Autónoma de México (UNAM) and the Geotechnical Extreme Events Reconnaissance Association (GEER). Two UNAM-GEER teams of researchers were sent to the region to investigate and document the effects from the earthquake: an advance team (from September 24 to September 30) and a main team (from September 29 to October 6). These teams incorporated advanced imaging and geophysical technologies to study and document the effects from this earthquake. The Version 1 summary report presents the preliminary observations from the UNAM-GEER advance team. Version 2 of this report contains the detailed observations and findings from both the advance and main UNAM-GEER teams.

Read the Full Report

Contributing Authors:

  • Mauricio Alcaráz, Universidad Nacional Autónoma de México
  • Pedro Arduino, University of Washington
  • Domniki Asimaki, California Institute of Technology
  • Adriana Badillo, Universidad Nacional Autónoma de México
  • Gabriel Candia, Universidad del Desarrollo-CIGIDEN, Chile
  • Ernesto Castañón, Universidad Nacional Autónoma de México
  • Jake Dafni, University of Washington
  • Shideh Dashti, University of Colorado, Boulder
  • Chadi S. El Mohtar, University of Texas, Austin
  • Kevin W. Franke, Brigham Young University
  • Tara C. Hutchinson, University of California, San Diego
  • Christian Ledezma, Pontificia Universidad Católica de Chile
  • Anne Lemnitzer, University of California, Irvine
  • Eric Lo, University of California, San Diego
  • Alejandro Martinez, University of California, Davis
  • Juan Manuel Mayoral Villa, Universidad Nacional Autónoma de México
  • Jorge Meneses, California Seismic Safety Commission
  • Gonzalo Montalva, Universidad de Concepción
  • Jack Montgomery, Auburn University
  • Alesandra C. Morales-Vélez, University of Puerto Rico at Mayaguez
  • Menzer Pehlivan, CH2M
  • Azucena Román, Universidad Nacional Autónoma de México
  • Simón Tepalcapa, Universidad Nacional Autónoma de México
  • Clinton M. Wood, University of Arkansas
  • Mark Yashinsky, California Dept. of Transportation (Caltrans)