In view of the fact that a portion of the trade wind segment of MIKE passed directly over the Philippines, it is Likely that -some parts of those islands received rainout radioactivity at least an order of magnituce greater than that reported. Bangkok collected @ peak value of 100,000 d/m from MIKE in no rain. Undoubtedly, some of southeastern Asia received larger amounts of radioactivity in rain - at least an order of magnitude greater than did Bangkok. . ual!. ha inten diate The highest value reported in Japan was 45,000 d/m from MIKE and only a few hundred d/m from KING. This relatively low activity was due to the fact that only the edge of the trade wind cloud touched Japan. Only during the warmer months of the summer could "any significant portion of the low-level cloud affect the Japanese Islands because the cold monsoon from Siberia dominates the circu- lation during the winter. In the summer half of the year, Japan . Maght receive levels.of activity similar to that derosited on Iwo Jira during MIKE (10° ‘d/m). During the winter, with strong winds off the continent, it is not likely that any low-level debris . would reach Japan. seid ae io ele 5.6 CENTRAL AMERICA AND NORTHERN SOUTH AMERICA The radiological stations in. Central and South America received practically no fission procucts from the HIKE burst; no sample prior te 15 November contained activity above a few. hundred d/m. It was impossible to compute trajectories from the Hawaiian area to the Americas, but in the absence of ccntradictory -evidence one can concludethat the urper tropospheric portion of the MIKE cloud passed north of Mexice City the first time around the world. The high tropospheric portion of the KING cloud apparently ‘moved much further south than did the MIKE cloud and deposited activity of about 800 d/m in Central America and 1800 d/m in nerthern South America. Had the MIKE cloud moved elong this more southerly path, the fallout would undoubtedly have been much greater. i Facific, the showers are commonly conteinec entirely witrin that current. sdadthe :IKE cloud followed the vath described by the KING debris, rainout from the trade wind showers easily covic have amountec to 10,000 d/n. uring periods of weak winds when thumd:r“clouds build up to the tropopause, zt is reasonadle to expect _ _ maximum activity of the order of 10° q/me oO haeelaie tics sect tan Trade winds are a feature of trorical America and as in the