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

○Information

○Measurement value list ： 2026/05/20(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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