5. An hourly reporting schedule for the off-site monitoring stations
was commenced at 0700M.
All off-site stations contimed to report normal
background readings through D+2 days.
6.
A reading of 80 mr/hr at H+6 hours at 10,000 feet was obtained by
one cloud tracking aircraft 60 miles northeast of BIKINI.
The same reading
was recorded at H+12 hours by a weather reporting aircraft 300 miles north-
east at 30,000 feet.
The maximm recorded reading was 110 mr/hr at 10,000
feet, 80 miles northwest of BIKINI at H+l1 hours, -
7. A sharp rise to 3 mr/hr was noted at PARRY Island at 17)5M, 26
June 1956, with an equally sharp decline to background.
Two mre peaks
were recorded, one of 3.75 mr/hr at 1900M, 26 June, and another of 0.75
mr/hr at 2330M, 26 June. These peaks are attributed to "shine" from the
pessing overhead of a radioactive cloud since the decrease was far too
repid for decay.
DNA