Great East Japan earthquake: preliminary observations

This document outlines the preliminary observations of the Great East Japan Earthquake of 11 March 2011 (GLIDE number: EQ-2011-000028-JPN) including: its type, hypocenter, magnitude; the subsequent tsunami; effects of the earthquake and tsunami in terms of human casualties and economic damage; the disaster affected area; disaster preparedness measures; pre-disaster measures, including non-structural measures; and recovery efforts.