This circle contains a daytime population of roughly 75,000. There will be no survivors. Those caught outside will be exposed to the full effects of the blast, including severe lung and ear drum damage and exposure to flying debris. Those in the direct line of sight of the blast will be exposed to a thermal pulse in excess of 500 cal/sq.cm., causing instant death. Those inside, though shielded from some of the blast and thermal effects, will be killed as buildings collapse.
