——_
SECUOTA
OPERATION
1.
EF
A
SFQUOIA was detonated on a barge one-half mile west of Yvonne
. Island, Eniwetok Atell, at 0630M, 2 July 1958
te 1,700 feet, then stabilized at
The cloud rose initially
Movement took place
within the trade wind level and averaged 275 degrees at 17 knots.
2,
The P2V reported early and started the lagoon survey at 0648M.
Readings of 30 to 40 mr/hr were taken ever debris in the water west of
Yvonne,
A reading of 12 r was found over the Yvenne air strip at 0725M.
No other significant readings were obtained, so re-entry hour was declared
at Ht2 hours.
3.
The fallout pattern lay between the radials 260 degrees to 290
degrees from ground zero and extendad for eighty miles.
>
Essentially all
ae
ved
¥
of the fallout came down within tha forecast radex area.
s+