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

○Information

○Measurement value list ： 2026/04/19(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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