1955 str Outian of Radvoact sot ce Sea around Bikin, 195° which, was propal iv due to eddy the > 257 vi ant.ctvelonte . Vertical distriou- ~ - ws trons of the radinact-vity in Sea water Figs.» Yard 10 show Tce distributions of radu, wefivits tose rhe veer 2p T se OR etd . a mae ot per. 7 North hysd tia Current along the lines respectssei oat to@ kim, 37 west we &- oan of! lhe 2 aest of 4S a .reduy the braneming: of Toe aetisaty oect or of Nes ee oon the figures rer se mt respec tively the latitude of the sires of Briain, and Enywetok Atos The strong activity 3S separated unr both sides uf these dotted lines ant the distance ot two maxima ‘$s about 100 km. The ceprh which shows tie activity of 100 cpm/ :3 at ahout 20m ae mm the do The fot rim sartace ran distribution of she cnloririty in %. below tne surface in the northern and southern parts and in the middle part i sinks down to about :20m It 18 note. worthy that the activity decreases rapidly down to only L8epmil at 200m ™ e vertical distribution of the saturation rate depth This corresponds fice Tes lyved oxygen «2 along 1S°N, to the depth of thermowo cline which was about 150m in tis area ARG The estimated amount of dow of vadioactivity was about 110° curieshour passirg through this section. On -:he vertical section at 570 km west of Bikini the distance of branching became broader and also the depth of 100 cpmj/ activity was 200m below the sea surface on in average. The flow of radioactivity was about 0.6 « i0° curie hour. The distance between the former and the latter section was abond 4600 km and assuming tha’ the speed of current was about 0.7 knots 31