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

○Information

○Measurement value list ： 2026/06/23(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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