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SHOT 6
a
Janet O-l2Hr
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Interval Activity
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~-—-—- Cumulative Activity |
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1
2
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TIME AFTER SHOT (HOURS)
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t2
Fig. 3.17 Variation of Beta Activity
with Time, Shot 6, Janet v-12 hour
nificant fallout from these shots being deposited over most land
areas of the shot atolls. Shot 4 fallout was significant from Dog
through How and light or non-existent on the other islands.
No photographs of the Shot 3 cloud were obtained.13/ The Shot
3 yield was relatively much lower than the yields from the other shots
and it can be postulated that the resultant cloud was mich smaller
and did not cover the entire shot atoll.
Deposition of Shot 3 fallout
at Bikini Atoll may be accounted for by examining the wind vectors at
shot time.
(Appendix B).
Surface and low altitude winds carried in-
tense activity to the stations immediately to the west of ground zero
immediately after the detonation. Winds at altitudes above 6000 ft
transported the cloud to the downwind stations 14 miles to the north
of ground zero 1/2 to 11/2 hr after the shot.
30403
Activity in the Base Surge
No evidence of base surge activity from Shots 1 and 4 was
found by this project, because all base surge sampling stations were
made inoperative either by blast pressures or by heavy waterwaves,.
The Director, Program 2, has stated that no evidence of a base surge
was found from any CASTLE shot but that secondary disturbances at the
base of the column of the surface water shots (in shallow water) have
. bean observed in photographs.
63