an TSS ion PRECIPITATION CODE: NO PRECIPITATION Tv TRACE L LIGHT (A0t-Quo me) 1 MODERATE (0.11-LOOm) 4 MEAVY (OVER 100 Wu) FIGURE A 20 RADIOACTIVE FALLOUT IN THE 24-HOUR PERIOD BEGINNING 1230 G.C.T, MARCH 9, 1954 KEY: activity PREcinitation AcTeity wm osmset? ay 100 Dave AFTER GURST ALL ACTIVITY (8 ASSIGNED TO BURST 10.1, GRAND RATS OTHERWISE WDICATED BY BURST NUMBER 1% PARENTHESES. oe a r 4 ile > “eae