Past measurement result　by Seawater Radiation Monitor near Fukushima Daiichi Nuclear Power Station

○Information

○Measurement value list ： 2026/06/22(CSV Download)

Radioactivity Concentration Unit:Bq/L

※ When being smaller then detection limit value, the numerical value is indicated with ND

TimeCs137Cs134Totalβ
00:00NDND23
00:10NDND24
00:20NDND21
00:30NDND20
00:40NDND19
00:50NDND19
01:00NDND19
01:10NDND18
01:20NDND18
01:30NDND18
01:40NDND21
01:50NDND20
02:00NDND21
02:10NDND23
02:20NDND22
02:30NDND21
02:40NDND18
02:50NDND17
03:00NDND17
03:10NDND18
03:20NDND20
03:30NDND20
03:40NDND19
03:50NDND21
04:00NDND19
04:10NDND17
04:20NDND15
04:30NDND17
04:40NDND18
04:50NDND17
05:00NDND19
05:10NDND19
05:20NDND18
05:30NDND14
05:40NDND13
05:50NDND11
06:00NDND9.5
06:10NDND9.9
06:20NDND12
06:30NDND14
06:40NDND15
06:50NDND16
07:00NDND17
07:10NDND18
07:20NDND17
07:30NDND17
07:40NDND18
07:50NDND17
08:00NDND18
08:10NDND18
08:20NDND19
08:30NDND18
08:40NDND18
08:50NDND20
09:00NDND19
09:10NDND20
09:20NDND20
09:30NDND19
09:40NDND18
09:50NDND18
10:00NDND16
10:10NDND17
10:20NDND17
10:30NDND18
10:40NDND18
10:50NDND17
11:00NDND19
11:10NDND19
11:20NDND21
11:30NDND23
11:40NDND24
11:50NDND25
12:00NDND23
12:10NDND21
12:20NDND21
12:30NDND20
12:40NDND20
12:50NDND19
13:00NDND18
13:10NDND22
13:20NDND22
13:30NDND24
13:40NDND26
13:50NDND26
14:00NDND27
14:10NDND26
14:20NDND24
14:30NDND22
14:40NDND22
14:50NDND22
15:00NDND22
15:10NDND22
15:20NDND22
15:30NDND22
15:40NDND21
15:50NDND21
16:00NDND20
16:10NDND21
16:20NDND21
16:30NDND22
16:40NDND20
16:50NDND22
17:00NDND25
17:10NDND25
17:20NDND27
17:30NDND27
17:40NDND27
17:50NDND24
18:00NDND22
18:10NDND21
18:20NDND21
18:30NDND18
18:40NDND19
18:50NDND22
19:00NDND22
19:10NDND22
19:20NDND17
19:30NDND19
19:40NDND20
19:50NDND18
20:00NDND18
20:10NDND18
20:20NDND21
20:30NDND22
20:40NDND18
20:50NDND19
21:00NDND16
21:10NDND14
21:20NDND14
21:30NDND13
21:40NDND16
21:50NDND16
22:00NDND19
22:10NDND22
22:20NDND22
22:30NDND22
22:40NDND21
22:50NDND20
23:00NDND19
23:10NDND20
23:20NDND20
23:30NDND20
23:40NDND21
23:50NDND20