Teapot Test Series
Nuclear Test POST
Detonated: 9 April 1955
Time: 1230 GMT
TYPE OF DETONATION: Tower
ALTITUDE OF DETONATION: 90 m (above ground)
REPORTED YIELD: 2 kilotons
RADIOIODINE (I-131) PRODUCED: 3.4 x 10E5 curies
STABILIZED CLOUD HEIGHT: Top 4.9 km, msl;
Base 4.0 km, msl
MEASUREMENTS AVAILABLE FROM GROUND-LEVEL COLLECTORS: Yes
RADIOIODINE IN COUNTIES WITHOUT GROUND-LEVEL COLLECTORS
ESTIMATED BY: Kriging
CLOSE-IN FALLOUT PATTERN AVAILABLE: Yes
Trajectory and Fallout Characteristics
Teapot, Post
Close-In Fallout
The pattern of measured Close-In Fallout (CIF) is shown in Fig.TP/8/X, a
map local to NTS. The light deposition showed three lobes, to the north,
northeast and southeast. Only the lobe lying 130 km to the southeast (the
longest one) reflected fallout from an upper-air trajectory, that at 4.9 km.
The other two lobes must have been influenced by winds at other levels since the
other upper air trajectory (4.3 km) moved to the south from the detonation site.
Deposition amounts were light, consistent with the small (2 kt) yield.
Town Data Base
The Town Data Base (TDB) deposition pattern (Fig.TP/8/TDB) radiated outward
from the detonation site in all directions between south, through southeast to
northeast. The deposition was light and was completely contained within the
following adjoining areas: area 3 of Nye County, area 2 of Clark County and area
2 of Lincoln County. The pattern roughly resembled that of the CIF
distribution. Fallout values, where the TDB and CIF overlapped, were reasonably
comparable. Several TDB sites that recorded fallout were outside of the
outermost contour of the CIF pattern. The wide directional distribution of TDB
observations was attributed to large directional shear of wind below 4.3
km (List, 1956).
County Data Base
The depositions shown in the County Data Base (CDB) map of Fig.TP/8/TCDB
covers an extremely large area for such a small yield (2 kt) tower test.
Arizona and New Mexico, traversed by both the 3.0 and 4.3 km trajectories
(Fig.TP/8/T) showed the lightest fallout although most counties of both states
had fallout. The heaviest CDB depositions were to the northeast of NTS in White
Pine County (NV), in several counties immediately south and east of Salt Lake
City (northeast Utah) and all of southwest Wyoming, areas never approached by
the 3.0 and 4.3 km trajectories. There were areas of moderate fallout
associated with the 3.0 km trajectory, however. These included all of southeast
Utah and all of western Colorado. List (1956) offers an explanation for the
heavy fallout to the northeast of NTS in a direction away from the initial
trajectory movement. He states that southerly winds below 3.0 km carried the
lower part of the debris cloud toward the north giving heavy depositions on the
first and second days after the explosion.
Upper-Air Trajectories
Both trajectories moved toward the south, initially, at very slow speed
(Fig.TP/8/T) but curved to the east and accelerated on the second day (1200 GMT,
10 April to 1200 GMT, 11 April) after the explosion. The 4.3 km trajectory
continued to move almost directly eastward across the U.S. and left the east
coast near Norfolk, Virginia, at the end of the fourth day. The 3.0
km trajectory, however, moved into northeast Colorado on the third day, reversed
direction to the southwest, crossed New Mexico (moving to the south), turned to
the left and arrived near Corpus Christi, Texas, at the end of the fourth day.
It accelerated and curved to the left, crossed Alabama and was dropped in
eastern West Virginia early on the sixth day (1200 GMT, 14 April to 1200 GMT, 15
April).
Deposition of radioactive iodine (I-131) was widespread over the U.S. east
of Nevada and amounts reported were unusually large for such a small yield (2
kt) test (Fig. TP/8/F). Widespread precipitation possibly accounted for the
larger deposition values particularly east of Utah and Arizona. However,
fallout was recorded far ahead of both trajectories and at long distances to the
side of them through the sixth day. Depositions were mostly in the eastern half
of the United States by the fifth day (1200 GMT, 13 April to 1200 GMT, 14 April)
and confined to the northeast by the sixth day. The central mountain states
incurred generous dry (and some wet) depositions on the second day and these
extended into the southwest on the third day (1200 GMT, 11 April to 1200 GMT, 12
April). Otherwise, depositions were generally the result of precipitation.
The observation of widespread fallout at large distances ahead of the
trajectories suggests that the debris cloud lifted considerably above 4.3 km and
became entrained in speedier higher-level winds. It is also possible that
residual debris from a high-level airburst (test HA), detonated only 3
days before Post, was a source of the depositions ahead of the Post
trajectories. In addition, a changing pattern of atmospheric waves traveling
around a strong low pressure area at 3.0 km located in the central plains,
caused strong winds, strong shears, and rapidly-changing flow patterns. This
was a factor in the widespread diffusion of radioactivity.
Reference
List, R.J., 1956: Radioactive Fallout in North America from Operation Teapot.
U.S. Weather Bureau, Washington, DC. NYO-4696, U.S. Atomic Energy Commission.
February 1956.
Figure TP/8/X. Map of close-in exposure rates, prepared by EG&G for the Department
of Energy, related to the test POST of 9 April 1955.
Figure TP/8/TDB/F. Estimated I-131 depositions, for each station of the
Town Data Base, resulting from the test POST of 9 April 1955.
The symbols indicate the range of I-131 deposition, denoted as DEP: . for DEP=0;
1 for DEP between 0 and 3 nCi m-2; 2 for DEP between 3 and 10 nCi m-2;
3 for DEP between 10 and 30 nCi m-2; 4 for DEP between 30 and 100 nCi m-2;
5 for DEP between 100 and 300 nCi m-2; 6 for DEP between 300 and 1,000 nCi m-2;
7 for DEP between 1,000 and 3,000 nCi m-2; 8 for DEP between 3,000 and 10,000
nCi m-2; 9 for DEP between 10,000 and 30,000 nCi m-2; A for DEP between 30,000
and 100,000 nCi m-2; B for DEP greater than 100,000 nCi m-2.
Figure TP/8/TDB/TOA. Estimated initial time of arrival of fallout, for
each station of the Town Data Base, resulting from the test POST of 9 April
1955.
The symbols indicate the range of initial time of arrival of fallout,
denoted as TOA: . if there is no deposition;
1 for TOA less than 3 hours;
2 for TOA between 3 and 10 hours; and
3 for TOA between 10 and 30 hours.
Table TP/8/TDB. Estimates of median I-131 depositions per unit area of ground
at the Town Data Base sites following the shot POST
detonated 4/ 9/1955.
Test Test Site State County Sub- I-131 GSD Deposition
name date code county deposition weight
(y/mo/d) (nCi/m2)
POST 550409 1 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 2 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 3 NV LINCOLN 1 0.0 1.0 0.0035
POST 550409 4 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 5 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 6 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 7 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 8 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 9 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 10 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 11 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 12 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 13 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 14 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 15 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 16 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 17 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 18 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 19 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 20 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 21 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 22 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 23 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 24 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 25 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 26 NV LINCOLN 1 0.0 1.0 0.0035
POST 550409 27 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 28 NV LINCOLN 1 0.0 1.0 0.0035
POST 550409 29 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 30 NV LINCOLN 1 0.0 1.0 0.0035
POST 550409 31 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 32 NV LINCOLN 1 0.0 1.0 0.0348
POST 550409 33 NV LINCOLN 1 0.0 1.0 0.0035
POST 550409 34 NV LINCOLN 1 0.0 1.0 0.0035
POST 550409 35 NV LINCOLN 1 0.0 1.0 0.0035
POST 550409 36 NV LINCOLN 2 420.0 1.4 0.1515
POST 550409 37 NV LINCOLN 2 118.0 1.4 0.0152
POST 550409 38 NV LINCOLN 2 192.4 1.4 0.0152
POST 550409 39 NV LINCOLN 2 420.0 1.4 0.1515
POST 550409 40 NV LINCOLN 2 0.0 1.0 0.1515
POST 550409 41 NV LINCOLN 2 0.0 1.0 0.1515
POST 550409 42 NV LINCOLN 2 0.0 1.0 0.1515
POST 550409 43 NV LINCOLN 2 0.0 1.0 0.1515
POST 550409 44 NV LINCOLN 2 0.0 1.0 0.0152
POST 550409 45 NV LINCOLN 2 82.7 1.9 0.0152
Table TP/8/TDB (continued)
Test Test Site State County Sub- I-131 GSD Deposition
name date code county deposition weight
(y/mo/d) (nCi/m2)
POST 550409 46 NV LINCOLN 2 0.0 1.0 0.0152
POST 550409 47 NV LINCOLN 2 0.0 1.0 0.0152
POST 550409 48 NV NYE 1 0.0 1.0 0.1389
POST 550409 49 NV NYE 1 0.0 1.0 0.1389
POST 550409 50 NV NYE 1 0.0 1.0 0.1389
POST 550409 51 NV NYE 1 0.0 1.0 0.1389
POST 550409 52 NV NYE 1 0.0 1.0 0.0139
POST 550409 53 NV NYE 1 0.0 1.0 0.0139
POST 550409 54 NV NYE 1 0.0 1.0 0.1389
POST 550409 55 NV NYE 1 0.0 1.0 0.1389
POST 550409 56 NV NYE 1 0.0 1.0 0.1389
POST 550409 57 NV NYE 2 84.6 1.4 0.0046
POST 550409 58 NV NYE 2 0.0 1.0 0.0046
POST 550409 59 NV NYE 2 0.0 1.0 0.0046
POST 550409 60 NV NYE 2 0.0 1.0 0.0046
POST 550409 61 NV NYE 2 0.0 1.0 0.0459
POST 550409 62 NV NYE 2 0.0 1.0 0.0046
POST 550409 63 NV NYE 2 0.0 1.0 0.0459
POST 550409 64 NV NYE 2 0.0 1.0 0.0046
POST 550409 65 NV NYE 2 0.0 1.0 0.0459
POST 550409 66 NV NYE 2 0.0 1.0 0.0459
POST 550409 67 NV NYE 2 0.0 1.0 0.0459
POST 550409 68 NV NYE 2 0.0 1.0 0.0459
POST 550409 69 NV NYE 2 0.0 1.0 0.0459
POST 550409 70 NV NYE 2 0.0 1.0 0.0459
POST 550409 71 NV NYE 2 0.0 1.0 0.0459
POST 550409 72 NV NYE 2 0.0 1.0 0.0459
POST 550409 73 NV NYE 2 0.0 1.0 0.0459
POST 550409 74 NV NYE 2 0.0 1.0 0.0459
POST 550409 75 NV NYE 2 0.0 1.0 0.0459
POST 550409 76 NV NYE 2 0.0 1.0 0.0459
POST 550409 77 NV NYE 2 0.0 1.0 0.0459
POST 550409 78 NV NYE 2 0.0 1.0 0.0459
POST 550409 79 NV NYE 2 0.0 1.0 0.0046
POST 550409 80 NV NYE 2 0.0 1.0 0.0459
POST 550409 81 NV NYE 2 0.0 1.0 0.0046
POST 550409 82 NV NYE 2 0.0 1.0 0.0459
POST 550409 83 NV NYE 2 0.0 1.0 0.0459
POST 550409 84 NV NYE 2 0.0 1.0 0.0459
POST 550409 85 NV NYE 2 0.0 1.0 0.0459
POST 550409 86 NV NYE 3 99.1 1.4 0.2439
POST 550409 87 NV NYE 3 0.0 1.0 0.0244
POST 550409 88 NV NYE 3 333.6 1.4 0.0244
POST 550409 89 NV NYE 3 344.0 1.4 0.0244
POST 550409 90 NV NYE 3 1687.2 1.4 0.0244
POST 550409 91 NV NYE 3 693.5 1.4 0.2439
POST 550409 92 NV NYE 3 1270.4 1.4 0.0244
Table TP/8/TDB (continued)
Test Test Site State County Sub- I-131 GSD Deposition
name date code county deposition weight
(y/mo/d) (nCi/m2)
POST 550409 93 NV NYE 3 0.0 1.0 0.2439
POST 550409 94 NV NYE 3 0.0 1.0 0.0244
POST 550409 95 NV NYE 3 0.0 1.0 0.0244
POST 550409 96 NV NYE 3 0.0 1.0 0.0244
POST 550409 97 NV NYE 3 0.0 1.0 0.0244
POST 550409 98 NV NYE 3 0.0 1.0 0.0244
POST 550409 99 NV NYE 3 0.0 1.0 0.0244
POST 550409 100 NV CLARK 1 0.0 1.0 0.0769
POST 550409 101 NV CLARK 1 68.4 1.4 0.0769
POST 550409 102 NV CLARK 1 0.0 1.0 0.0769
POST 550409 103 NV CLARK 1 0.0 1.0 0.0769
POST 550409 104 NV CLARK 1 0.0 1.0 0.0769
POST 550409 105 NV CLARK 1 0.0 1.0 0.0769
POST 550409 106 NV CLARK 1 0.0 1.0 0.0769
POST 550409 107 NV CLARK 1 0.0 1.0 0.0769
POST 550409 108 NV CLARK 1 0.0 1.0 0.0769
POST 550409 109 NV CLARK 1 0.0 1.0 0.0769
POST 550409 110 NV CLARK 1 0.0 1.0 0.0769
POST 550409 111 NV CLARK 1 0.0 1.0 0.0769
POST 550409 112 NV CLARK 1 0.0 1.0 0.0769
POST 550409 113 NV CLARK 2 408.1 1.4 0.0102
POST 550409 114 NV CLARK 2 0.0 1.0 0.1020
POST 550409 115 NV CLARK 2 0.0 1.0 0.0102
POST 550409 116 NV CLARK 2 0.0 1.0 0.1020
POST 550409 117 NV CLARK 2 0.0 1.0 0.1020
POST 550409 118 NV CLARK 2 122.4 1.4 0.1020
POST 550409 119 NV CLARK 2 0.0 1.0 0.1020
POST 550409 120 NV CLARK 2 0.0 1.0 0.1020
POST 550409 121 NV CLARK 2 412.5 1.4 0.0102
POST 550409 122 NV CLARK 2 0.0 1.0 0.1020
POST 550409 123 NV CLARK 2 414.0 1.4 0.0102
POST 550409 124 NV CLARK 2 0.0 1.0 0.1020
POST 550409 125 NV CLARK 2 0.0 1.0 0.0102
POST 550409 126 NV CLARK 2 0.0 1.0 0.0102
POST 550409 127 NV CLARK 2 0.0 1.0 0.1020
POST 550409 128 NV CLARK 2 157.5 1.4 0.0102
POST 550409 129 NV CLARK 2 388.5 1.4 0.0102
POST 550409 130 NV CLARK 3 0.0 1.0 0.3333
POST 550409 131 NV CLARK 3 0.0 1.0 0.3333
POST 550409 132 NV CLARK 3 0.0 1.0 0.3333
POST 550409 133 NV ESMERALDA 1 0.0 1.0 0.7143
POST 550409 134 NV ESMERALDA 1 0.0 1.0 0.0714
POST 550409 135 NV ESMERALDA 1 0.0 1.0 0.0714
POST 550409 136 NV ESMERALDA 1 0.0 1.0 0.0714
POST 550409 137 NV ESMERALDA 1 0.0 1.0 0.0714
POST 550409 138 NV ESMERALDA 2 0.0 1.0 0.2500
POST 550409 139 NV ESMERALDA 2 0.0 1.0 0.2500
Table TP/8/TDB (continued)
Test Test Site State County Sub- I-131 GSD Deposition
name date code county deposition weight
(y/mo/d) (nCi/m2)
POST 550409 140 NV ESMERALDA 2 0.0 1.0 0.2500
POST 550409 141 NV ESMERALDA 2 0.0 1.0 0.2500
POST 550409 142 UT WASHINGTON 1 0.0 1.0 0.2439
POST 550409 143 UT WASHINGTON 1 0.0 1.0 0.2439
POST 550409 144 UT WASHINGTON 1 0.0 1.0 0.2439
POST 550409 145 UT WASHINGTON 1 0.0 1.0 0.2439
POST 550409 146 UT WASHINGTON 1 0.0 1.0 0.0244
POST 550409 147 UT WASHINGTON 2 0.0 1.0 0.0179
POST 550409 148 UT WASHINGTON 2 0.0 1.0 0.1786
POST 550409 149 UT WASHINGTON 2 0.0 1.0 0.0179
POST 550409 150 UT WASHINGTON 2 0.0 1.0 0.1786
POST 550409 151 UT WASHINGTON 2 0.0 1.0 0.1786
POST 550409 152 UT WASHINGTON 2 0.0 1.0 0.1786
POST 550409 153 UT WASHINGTON 2 0.0 1.0 0.1786
POST 550409 154 UT WASHINGTON 2 0.0 1.0 0.0179
POST 550409 155 UT WASHINGTON 2 0.0 1.0 0.0179
POST 550409 156 UT WASHINGTON 2 0.0 1.0 0.0179
POST 550409 157 UT WASHINGTON 2 0.0 1.0 0.0179
POST 550409 158 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 159 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 160 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 161 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 162 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 163 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 164 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 165 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 166 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 167 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 168 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 169 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 170 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 171 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 172 UT WASHINGTON 3 0.0 1.0 0.0625
POST 550409 173 UT WASHINGTON 3 0.0 1.0 0.0625
Figure TP/8/TCDB.
Table TP/8/CDB. Estimates of median I-131 depositions per unit area of ground
in the County Data Base area following the shot POST
detonated 4/ 9/1955.
TEST TEST State County FIPS I-131 GSD
name date code deposition
(y/mo/d) (nCi/m2)
POST 550409 AZ APACHE 4001 19.3 1.9
POST 550409 AZ COCHISE 4003 0.0 0.0
POST 550409 AZ GILA 4007 9.2 1.7
POST 550409 AZ GRAHAM 4009 0.0 0.0
POST 550409 AZ GREENLEE 4011 0.0 0.0
POST 550409 AZ MARICOPA 4013 9.2 1.5
POST 550409 AZ NAVAJO 4017 19.5 1.9
POST 550409 AZ PIMA 4019 0.0 0.0
POST 550409 AZ PINAL 4021 0.0 0.0
POST 550409 AZ SANTA CRUZ 4023 0.0 0.0
POST 550409 AZ YAVAPAI 4025 20.0 1.7
POST 550409 AZ YUMA 4027 0.0 0.0
POST 550409 AZ MOHAVE1 4151 50.3 1.9
POST 550409 AZ MOHAVE2 4152 30.2 1.9
POST 550409 AZ MOHAVE3 4153 49.6 1.9
POST 550409 AZ MOHAVE4 4154 49.6 1.9
POST 550409 AZ COCONINO1 4501 49.6 1.9
POST 550409 AZ COCONINO2 4502 29.7 1.9
POST 550409 AZ COCONINO3 4503 9.9 1.5
POST 550409 CA LOS ANGELE 6037 0.0 0.0
POST 550409 CA MONO 6051 0.0 0.0
POST 550409 CA SAN BERNAD 6071 0.0 0.0
POST 550409 CA INYO1 6271 0.0 0.0
POST 550409 CA INYO2 6272 0.0 0.0
POST 550409 CA INYO3 6273 205.5 1.9
POST 550409 CO DELTA 8029 143.5 1.7
POST 550409 CO DOLORES 8033 95.6 1.9
POST 550409 CO GARFIELD 8045 189.9 1.7
POST 550409 CO LA PLATA 8067 47.8 1.9
POST 550409 CO MESA 8077 191.3 1.5
POST 550409 CO MOFFAT 8081 280.8 1.9
POST 550409 CO MONTEZUMA 8083 47.8 1.9
POST 550409 CO MONTROSE 8085 191.3 1.9
POST 550409 CO OURAY 8091 143.5 1.9
POST 550409 CO RIO BLANCO 8103 282.8 1.9
POST 550409 CO SAN JUAN 8111 95.6 1.9
POST 550409 CO SAN MIGUEL 8113 95.6 1.9
POST 550409 ID ADA 16001 0.0 0.0
POST 550409 ID BANNOCK 16005 0.0 0.0
POST 550409 ID BEAR LAKE 16007 28.1 1.9
POST 550409 ID BINGHAM 16011 0.0 0.0
POST 550409 ID BONNEVILLE 16019 0.0 0.0
POST 550409 ID CANYON 16027 0.0 0.0
POST 550409 ID CARIBOU 16029 0.0 0.0
POST 550409 ID CASSIA 16031 0.0 0.0
Table TP/8/CDB (continued)
TEST TEST State County FIPS I-131 GSD
name date code deposition
(y/mo/d) (nCi/m2)
POST 550409 ID ELMORE 16039 0.0 0.0
POST 550409 ID FRANKLIN 16041 0.0 0.0
POST 550409 ID GOODING 16047 0.0 0.0
POST 550409 ID JEROME 16053 0.0 0.0
POST 550409 ID LINCOLN 16063 0.0 0.0
POST 550409 ID MINIDOKA 16067 0.0 0.0
POST 550409 ID ONEIDA 16071 0.0 0.0
POST 550409 ID OWYHEE 16073 0.0 0.0
POST 550409 ID POWER 16077 0.0 0.0
POST 550409 ID TWIN FALLS 16083 0.0 0.0
POST 550409 NV CHURCHILL 32001 0.0 0.0
POST 550409 NV DOUGLAS 32005 0.0 0.0
POST 550409 NV ELKO 32007 0.0 0.0
POST 550409 NV EUREKA 32011 0.0 0.0
POST 550409 NV HUMBOLDT 32013 0.0 0.0
POST 550409 NV LYON 32019 0.0 0.0
POST 550409 NV MINERAL 32021 0.0 0.0
POST 550409 NV PERSHING 32027 0.0 0.0
POST 550409 NV STOREY 32029 0.0 0.0
POST 550409 NV WASHOE 32031 0.0 0.0
POST 550409 NV WHITE PINE 32331 326.5 1.5
POST 550409 NV WHITE PINE 32332 326.5 1.9
POST 550409 NV WHITE PINE 32333 204.0 1.9
POST 550409 NV CARSON CIT 32510 0.0 0.0
POST 550409 NV LANDER1 32551 0.0 0.0
POST 550409 NV LANDER2 32552 0.0 0.0
POST 550409 NM BERNALILLO 35001 18.2 1.5
POST 550409 NM CATRON 35003 9.1 1.7
POST 550409 NM CHAVES 35005 8.5 1.5
POST 550409 NM COLFAX 35007 17.5 1.7
POST 550409 NM CURRY 35009 8.5 1.7
POST 550409 NM DE BACA 35011 8.5 1.7
POST 550409 NM DONA ANA 35013 0.0 0.0
POST 550409 NM EDDY 35015 0.0 0.0
POST 550409 NM GRANT 35017 0.0 0.0
POST 550409 NM GUADALUPE 35019 17.2 1.7
POST 550409 NM HARDING 35021 8.5 1.7
POST 550409 NM HIDALGO 35023 0.0 0.0
POST 550409 NM LEA 35025 0.0 0.0
POST 550409 NM LINCOLN 35027 8.6 1.7
POST 550409 NM LOS ALAMOS 35028 18.9 1.7
POST 550409 NM LUNA 35029 0.0 0.0
POST 550409 NM MCKINLEY 35031 9.6 1.7
POST 550409 NM MORA 35033 17.2 1.7
POST 550409 NM OTERO 35035 0.0 0.0
Table TP/8/CDB (continued)
TEST TEST State County FIPS I-131 GSD
name date code deposition
(y/mo/d) (nCi/m2)
POST 550409 NM QUAY 35037 8.5 1.7
POST 550409 NM RIO ARRIBA 35039 18.9 1.7
POST 550409 NM ROOSEVELT 35041 8.5 1.7
POST 550409 NM SANDOVAL 35043 18.2 1.7
POST 550409 NM SAN JUAN 35045 19.1 1.7
POST 550409 NM SAN MIGUEL 35047 17.2 1.7
POST 550409 NM SANTA FE 35049 17.7 1.7
POST 550409 NM SIERRA 35051 0.0 0.0
POST 550409 NM SOCORRO 35053 8.8 1.7
POST 550409 NM TAOS 35055 18.3 1.7
POST 550409 NM TORRANCE 35057 8.8 1.7
POST 550409 NM UNION 35059 8.5 1.7
POST 550409 NM VALENCIA 35061 18.2 1.7
POST 550409 OR HARNEY 41025 0.0 0.0
POST 550409 OR MALHEUR 41045 0.0 0.0
POST 550409 UT BEAVER 49001 128.9 1.9
POST 550409 UT CACHE 49005 37.2 1.9
POST 550409 UT CARBON 49007 188.5 1.9
POST 550409 UT DAGGETT 49009 185.9 1.9
POST 550409 UT DAVIS 49011 374.4 1.7
POST 550409 UT DUCHESNE 49013 280.8 1.9
POST 550409 UT EMERY 49015 97.0 1.9
POST 550409 UT GARFIELD 49017 97.7 1.9
POST 550409 UT GRAND 49019 96.3 1.9
POST 550409 UT JUAB 49023 145.5 1.9
POST 550409 UT MILLARD 49027 295.3 1.9
POST 550409 UT MORGAN 49029 374.4 1.9
POST 550409 UT PIUTE 49031 97.7 1.9
POST 550409 UT RICH 49033 37.2 1.9
POST 550409 UT SALT LAKE 49035 471.4 1.5
POST 550409 UT SAN JUAN 49037 48.2 1.9
POST 550409 UT SANPETE 49039 95.6 1.9
POST 550409 UT SEVIER 49041 97.7 1.9
POST 550409 UT SUMMIT 49043 375.7 1.7
POST 550409 UT UINTAH 49047 278.8 1.9
POST 550409 UT UTAH 49049 332.3 1.9
POST 550409 UT WASATCH 49051 377.1 1.9
POST 550409 UT WAYNE 49055 96.7 1.9
POST 550409 UT WEBER 49057 280.8 1.9
POST 550409 UT IRON1 49211 100.6 1.9
POST 550409 UT IRON2 49212 100.6 1.9
POST 550409 UT IRON3 49213 100.6 1.9
POST 550409 UT KANE1 49251 49.2 1.9
POST 550409 UT KANE2 49252 49.2 1.9
Table TP/8/CDB (continued)
TEST TEST State County FIPS I-131 GSD
name date code deposition
(y/mo/d) (nCi/m2)
POST 550409 UT TOOELE1 49451 96.3 1.9
POST 550409 UT TOOELE2 49452 471.4 1.7
POST 550409 UT BOX ELDER1 49931 46.8 1.9
POST 550409 UT BOX ELDER2 49932 187.2 1.9
POST 550409 WY CARBON 56007 185.9 1.9
POST 550409 WY FREMONT 56013 185.9 1.9
POST 550409 WY LINCOLN 56023 93.6 1.9
POST 550409 WY SUBLETTE 56035 92.9 1.9
POST 550409 WY SWEETWATER 56037 278.8 1.9
POST 550409 WY UINTA 56041 325.2 1.9
Figure TP/8/T. Estimated trajectories, at several altitudes, of the radioactive cloud resulting
from the test POST of 9 April 1955. Numbers indicate the position of each
trajectory at 0000 GMT for several days following the explosion.
Figure TP/8/F.
Table TP/8/GF. Estimates of I-131 daily deposition derived from gummed-film results and associated
precipitation indices for the shot POSTdetonated 4/ 9/1955.
. Dep = daily deposition of I-131 per unit area of ground (nCi per sq m)
. Pi = precipitation index
Site State Month and day
__________________________________________________________________________________________________
4/ 9 4/10 4/11 4/12 4/13 4/14 4/15 4/16
Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi
ABILENE TX 0 1 0 1 11 5 0 1 0 1 0 1 0 1 0 1
ALBANY NY 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
ALBUQUERQUE NM 0 1 0 1 8 1 1 1 2 1 0 1 0 1 0 1
ALPENA MI 0 1 0 1 0 1 0 1 18 6 3 5 0 1 0 1
AMARILLO TX 0 1 0 1 0 1 6 3 0 1 0 1 0 1 0 1
ATLANTA GA 0 1 0 1 0 1 0 1 9 7 0 1 0 1 0 1
BALTIMORE MD 0 1 0 1 3 5 0 1 1 5 4 6 0 1 0 1
BILLINGS MT 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
BINGHAMTON NY 0 1 0 1 0 1 4 5 0 1 0 1 0 1 0 1
BOISE ID 5 1 3 5 1 3 0 1 1 3 3 5 0 1 0 1
BOSTON MA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
BUFFALO NY 0 1 0 1 3 3 2 4 5 5 8 6 4 6 0 1
CARIBOU ME 0 1 0 1 0 1 0 1 0 1 6 6 0 1 0 1
CASPER WY 0 1 47 3 13 3 0 1 0 1 3 1 0 1 0 1
CHARLESTON SC 0 1 0 1 9 7 0 1 2 6 5 5 0 1 0 1
CHEYENNE WY 0 1 3 1 2 1 0 1 0 1 0 1 0 1 0 1
CHICAGO IL 0 1 0 1 0 1 4 5 2 4 0 1 0 1 0 1
CLEVELAND OH 0 1 0 1 0 1 0 1 4 5 27 7 2 4 0 1
COLO SPRINGS CO 0 1 4 1 16 3 0 1 0 1 0 1 0 1 0 1
CONCORD NH 0 1 0 1 0 1 0 1 0 1 2 3 0 1 0 1
CONCORDIA KS 0 1 2 2 3 4 35 5 3 5 0 1 0 1 0 1
CORPUS CRIS. TX 0 1 0 1 0 1 7 1 0 1 0 1 0 1 0 1
DALLAS TX 0 1 0 1 46 6 16 6 0 1 0 1 0 1 0 1
DEL RIO TX 0 1 0 1 0 1 4 1 0 1 0 1 0 1 0 1
DENVER CO 0 1 0 1 11 5 0 1 0 1 0 1 0 1 0 1
DES MOINES IA 0 1 3 3 4 6 5 4 14 6 0 1 0 1 0 1
DETROIT MI 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
ELKO NV 0 1 3 2 0 1 0 1 0 1 0 1 0 1 0 1
ELY NV 142 1 141 1 4 1 1 1 0 1 4 1 0 1 0 1
EUREKA CA 0 1 0 1 0 1 5 5 2 3 0 1 0 1 0 1
FARGO ND 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
FLAGSTAFF AZ 0 1 11 1 2 1 0 1 0 1 0 1 0 1 0 1
FORT SMITH AK 0 1 2 4 6 4 5 2 4 5 0 1 0 1 0 1
____________________
NA = not available
1 Table TP/8/GF (continued)
Site State Month and day
__________________________________________________________________________________________________
4/ 9 4/10 4/11 4/12 4/13 4/14 4/15 4/16
Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi
FRESNO CA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
GOODLAND KS 0 1 2 3 35 5 13 5 0 1 0 1 0 1 0 1
GRAND JNC CO 0 1 176 5 12 1 0 1 0 1 0 1 0 1 0 1
GRAND RAPIDS MI 0 1 0 1 2 4 1 3 1 2 1 3 0 1 0 1
GREEN BAY WI 0 1 0 1 2 3 1 3 3 5 0 1 0 1 0 1
HATTERAS NC 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
HELENA MT 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
HURON SD 0 1 0 1 1 2 0 1 0 1 0 1 0 1 0 1
JACKSON MS 0 1 0 1 0 1 27 7 NA 1 0 1 0 1 0 1
JACKSONVILLE FL 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
KALISPELL MT 1 3 0 1 0 1 0 1 0 1 0 1 0 1 0 1
KNOXVILLE TN 0 1 0 1 0 1 0 1 4 6 4 5 0 1 0 1
LAGUARDIA NY 0 1 0 1 0 1 12 6 1 4 5 5 0 1 0 1
LAS VEGAS NV 36 1 30 2 6 1 1 1 2 1 4 1 0 1 0 1
LOS ANGELES CA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
LOUISVILLE KY 0 1 0 1 16 6 8 5 1 2 0 1 0 1 0 1
LYNCHBURG VA 0 1 0 1 8 5 0 1 6 7 8 6 0 1 0 1
MARQUETTE MI 0 1 0 1 0 1 0 1 9 7 0 1 0 1 0 1
MEDFORD OR 2 4 0 1 1 2 0 1 0 1 0 1 0 1 0 1
MEMPHIS TN 0 1 0 1 0 1 18 8 3 2 0 1 0 1 0 1
MIAMI FL 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
MILFORD UT 0 1 67 2 4 1 0 1 0 1 4 1 0 1 0 1
MILWAUKEE WI 0 1 0 1 8 5 1 3 2 6 3 3 0 1 0 1
MINNEAPOLIS MN 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
MOBILE AL 0 1 0 1 0 1 5 5 24 7 0 1 0 1 0 1
MONTGOMERY AL 0 1 0 1 0 1 0 1 12 7 0 1 0 1 0 1
MT. WASH. NH 0 1 3 1 3 1 0 1 1 1 6 6 4 6 3 1
NEW HAVEN CT 0 1 0 1 0 1 2 4 1 3 3 5 0 1 0 1
NEW ORLEANS LA 0 1 0 1 0 1 30 7 3 1 0 1 0 1 0 1
NEW YORK AEC NY 0 1 0 1 18 6 NA 1 1 5 2 4 0 1 0 1
PHILADELPHIA PA 0 1 0 1 0 1 16 6 0 1 0 1 0 1 0 1
PHOENIX AZ 0 1 0 1 8 1 0 1 0 1 0 1 0 1 0 1
PITTSBURGH PA 0 1 0 1 7 5 0 1 0 1 0 1 0 1 0 1
POCATELLO ID 0 1 0 1 0 1 0 1 0 1 2 2 0 1 0 1
____________________
NA = not available
1 Table TP/8/GF (continued)
Site State Month and day
__________________________________________________________________________________________________
4/ 9 4/10 4/11 4/12 4/13 4/14 4/15 4/16
Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi Dep Pi
PORT ARTHUR TX 0 1 0 1 0 1 10 6 0 1 0 1 0 1 0 1
PORTLAND OR 0 1 3 5 1 5 7 5 0 1 0 1 0 1 0 1
PROVIDENCE RI 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
PUEBLO CO 0 1 0 1 3 3 0 1 0 1 0 1 0 1 0 1
RAPID CITY SD 0 1 0 1 12 6 5 5 NA 1 0 1 0 1 0 1
RENO NV 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
ROCHESTER NY 0 1 0 1 0 1 0 1 7 5 0 1 0 1 0 1
ROSWELL NM 0 1 0 1 4 1 4 1 0 1 0 1 0 1 0 1
SACRAMENTO CA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
SALT LAKE UT 0 1 451 5 3 2 4 1 3 1 3 1 0 1 0 1
SAN DIEGO CA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
SAN FRAN. CA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
SCOTTSBLUFF NB 0 1 0 1 24 6 9 5 0 1 0 1 0 1 0 1
SEATTLE WA 0 1 10 6 3 5 0 1 0 1 0 1 0 1 0 1
SPOKANE WA 4 3 0 1 0 1 0 1 0 1 0 1 0 1 0 1
ST. LOUIS MO 0 1 0 1 0 1 6 6 2 4 0 1 0 1 0 1
SYRACUSE NY 0 1 0 1 0 1 0 1 0 1 1 3 0 1 0 1
TUCSON AZ 0 1 0 1 2 1 0 1 0 1 0 1 0 1 0 1
WASHINGTON DC 0 1 0 1 6 6 1 4 2 4 6 7 0 1 0 1
WICHITA KS 0 1 0 1 0 1 3 1 7 5 0 1 0 1 0 1
WILLISTON ND 0 1 0 1 4 3 0 1 0 1 2 3 0 1 0 1
YUMA AZ 0 1 0 1 10 1 0 1 0 1 0 1 0 1 0 1
____________________
NA = not available
Figure TP/8/CD.