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

○Information

○Measurement value list ： 2026/06/21(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND15
00:10NDND15
00:20NDND16
00:30NDND15
00:40NDND14
00:50NDND14
01:00NDND14
01:10NDND15
01:20NDND14
01:30NDND16
01:40NDND16
01:50NDND18
02:00NDND18
02:10NDND16
02:20NDND15
02:30NDND13
02:40NDND12
02:50NDND12
03:00NDND11
03:10NDND10
03:20NDND12
03:30NDND12
03:40NDND13
03:50NDND12
04:00NDND15
04:10NDND16
04:20NDND14
04:30NDND12
04:40NDND12
04:50NDND14
05:00NDND13
05:10NDND14
05:20NDND17
05:30NDND19
05:40NDND20
05:50NDND21
06:00NDND21
06:10NDND22
06:20NDND22
06:30NDND23
06:40NDND20
06:50NDND19
07:00NDND20
07:10NDND20
07:20NDND19
07:30NDND17
07:40NDND19
07:50NDND19
08:00NDND17
08:10NDND17
08:20NDND15
08:30NDND17
08:40NDND16
08:50NDND17
09:00NDND18
09:10NDND18
09:20NDND22
09:30NDND20
09:40NDND19
09:50NDND19
10:00NDND21
10:10NDND21
10:20NDND17
10:30NDND19
10:40NDND22
10:50NDND21
11:00NDND19
11:10NDND20
11:20NDND22
11:30NDND24
11:40NDND21
11:500.064ND21
12:000.082ND23
12:100.064ND22
12:200.073ND23
12:300.073ND22
12:400.052ND21
12:500.063ND22
13:000.057ND20
13:100.071ND20
13:200.082ND18
13:300.088ND16
13:400.087ND18
13:500.11ND17
14:000.10ND17
14:100.091ND15
14:200.085ND18
14:300.12ND20
14:400.075ND20
14:50NDND20
15:00NDND21
15:10NDND20
15:20NDND18
15:30NDND18
15:40NDND18
15:50NDND20
16:00NDND19
16:10NDND21
16:20NDND22
16:30NDND21
16:400.071ND22
16:500.055ND20
17:00NDND21
17:10NDND21
17:20NDND20
17:30NDND20
17:40NDND20
17:50NDND20
18:00NDND20
18:10NDND21
18:20NDND20
18:30NDND21
18:40NDND20
18:50NDND18
19:00NDND20
19:10NDND20
19:20NDND20
19:30NDND21
19:40NDND24
19:50NDND25
20:00NDND23
20:10NDND22
20:20NDND23
20:30NDND19
20:40NDND18
20:50NDND19
21:00NDND18
21:10NDND16
21:20NDND15
21:30NDND18
21:40NDND17
21:50NDND14
22:00NDND15
22:10NDND15
22:20NDND17
22:30NDND16
22:40NDND16
22:50NDND19
23:00NDND22
23:10NDND23
23:20NDND24
23:30NDND26
23:40NDND26
23:50NDND25