Table 1. Gamma dose rates three feet above ground in milliroentgens
per hour at Belle Island,
March 21, 1955,*
Date
Days after
5-14-54
Eniwetok Atoll,
Mr/hr
Date
May 15, 1954 to
Days after
5-14-54
Mr/hr
5-15-54
1.4
375
6-10
27
20
5-16
2.2
230
6-11
28
19
5-17
3
180
6-18
35
13
5-18
4
130
6-25
42
12
5-19
5
140
- 7-1
48
10
5-22
8
70
7-8
55
6.5
6-1
18
30
7-15
62
6
6-2
19
30
8-5
83
5
6-3
20
28
9-7
116
2
6-4
21
27
11-30
200
2.6
6-7
24
22
3-21-55
305
0.8
*Early readings taken with a PDR-39 ionization chamber
survey meter and later readings with a Juno AEC Model
S1C-17C survey meter.