Scale 1:55,630,000 ;; Winkel Tripel proj.- Supplement to the April 2006 National Geographic Magazine./ Includes inset map of the Pacific Ring of fire, depictions of earthquake risk zones and tectonic plate boundaries, text including Cities on edge, and cross sections of the central California and Islamabad areas./ Building for protection and Waves of destruction, and graphic of a hypothetical city showing potential earthquake destruction on verso.