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

○Information

○Measurement value list ： 2026/05/31(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND9.5
00:10NDND8.9
00:20NDND10
00:30NDND11
00:40NDND12
00:50NDND14
01:00NDND16
01:10NDND17
01:20NDND18
01:30NDND19
01:40NDND18
01:50NDND17
02:00NDND17
02:10NDND13
02:20NDND14
02:30NDND12
02:40NDND13
02:50NDND14
03:00NDND12
03:10NDND14
03:20NDND10
03:30NDND13
03:40NDND12
03:50NDND11
04:00NDND14
04:10NDND15
04:20NDND15
04:30NDND13
04:40NDND16
04:50NDND18
05:00NDND15
05:10NDND15
05:20NDND18
05:30NDND21
05:40NDND19
05:50NDND18
06:00NDND20
06:10NDND20
06:20NDND18
06:30NDND15
06:40NDND16
06:50NDND17
07:00NDND17
07:10NDND17
07:20NDND18
07:30NDND19
07:40NDND21
07:50NDND19
08:00NDND20
08:10NDND18
08:20NDND21
08:30NDND19
08:40NDND18
08:50NDND19
09:00NDND19
09:10NDND20
09:20NDND18
09:30NDND18
09:40NDND18
09:50NDND16
10:00NDND15
10:10NDND17
10:20NDND16
10:30NDND17
10:40NDND17
10:50NDND18
11:00NDND20
11:10NDND18
11:20NDND20
11:30NDND21
11:40NDND18
11:50NDND16
12:00NDND16
12:10NDND15
12:20NDND14
12:30NDND14
12:40NDND17
12:50NDND17
13:00NDND17
13:10NDND16
13:20NDND17
13:30NDND17
13:40NDND14
13:50NDND15
14:00NDND17
14:10NDND16
14:20NDND17
14:30NDND14
14:40NDND15
14:50NDND17
15:00NDND14
15:10NDND14
15:20NDND16
15:30NDND16
15:40NDND17
15:50NDND15
16:00NDND18
16:10NDND20
16:20NDND18
16:30NDND20
16:40NDND21
16:50NDND21
17:00NDND21
17:10NDND22
17:20NDND23
17:30NDND22
17:40NDND20
17:50NDND20
18:00NDND18
18:10NDND15
18:20NDND15
18:30NDND14
18:40NDND14
18:50NDND17
19:00NDND17
19:10NDND18
19:20NDND16
19:30NDND15
19:40NDND15
19:50NDND10
20:00NDND10
20:10NDND9.9
20:20NDND11
20:30NDND14
20:40NDND12
20:50NDND14
21:00NDND17
21:10NDND18
21:20NDND19
21:30NDND16
21:40NDND18
21:50NDND16
22:00NDND15
22:10NDND13
22:20NDND14
22:30NDND16
22:40NDND16
22:50NDND18
23:00NDND18
23:10NDND19
23:20NDND19
23:30NDND18
23:40NDND19
23:50NDND15