The shock wave will have moved out 1.2 miles in the 5 seconds as the ring of destruction is extended out to 3.5 miles. The overpressure at the edge of the ring, which covers about 16 square miles, will be 5 psi. Reinforced structures will be heavily damaged as well as unreinforced residential. Again, some structures will be shielded by the city’s hills and thus receive reduced damage. Both the University of San Francisco and the University of California at San Francisco campuses are within this ring and will likely receive heavy damage.
