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

○Information

○Measurement value list ： 2026/09/21(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND14
00:10NDND14
00:20NDND16
00:30NDND15
00:40NDND13
00:50NDND14
01:00NDND14
01:10NDND14
01:20NDND12
01:30NDND13
01:40NDND13
01:50NDND14
02:00NDND14
02:10NDND13
02:20NDND12
02:30NDND11
02:40NDND12
02:50NDND11
03:00NDND11
03:10NDND13
03:20NDND13
03:30NDND13
03:40NDND12
03:50NDND12
04:00NDND15
04:10NDND12
04:20NDND12
04:30NDND14
04:40NDND16
04:50NDND16
05:00NDND16
05:10NDND16
05:20NDND19
05:30NDND16
05:40NDND14
05:50NDND14
06:00NDND15
06:10NDND16
06:20NDND13
06:30NDND13
06:40NDND14
06:50NDND14
07:00NDND14
07:10NDND13
07:20NDND16
07:30NDND16
07:40NDND17
07:50NDND16
08:00NDND16
08:10NDND18
08:20NDND17
08:30NDND17
08:40NDND16
08:50NDND17
09:00NDND15
09:10NDND15
09:20NDND15
09:30NDND16
09:40NDND18
09:50NDND16
10:00NDND15
10:10NDND14
10:20NDND12
10:30NDND10
10:40NDNDND
10:50NDND9.3
11:00NDND10
11:10NDND12
11:20NDND14
11:30NDND17
11:40NDND17
11:50NDND19
12:00NDND19
12:10NDND18
12:20NDND17
12:30NDND17
12:40NDND16
12:50NDND14
13:00NDND16
13:10NDND16
13:20NDND17
13:30NDND16
13:40NDND14
13:50NDND16
14:00NDND16
14:10NDND12
14:20NDND13
14:30NDND13
14:40NDND17
14:50NDND15
15:00NDND15
15:10NDND17
15:20NDND16
15:30NDND14
15:40NDND16
15:50NDND17
16:00NDND17
16:10NDND18
16:20NDND18
16:30NDND17
16:40NDND16
16:50NDND18
17:00NDND17
17:10NDND17
17:20NDND15
17:30NDND18
17:40NDND19
17:50NDND19
18:00NDND19
18:10NDND21
18:20NDND24
18:30NDND21
18:40NDND18
18:50NDND17
19:00NDND17
19:10NDND14
19:20NDND12
19:30NDND13
19:40NDND15
19:50NDND12
20:00NDND9.9
20:10NDND14
20:20NDND16
20:30NDND19
20:40NDND16
20:50NDND20
21:00NDND21
21:10NDND16
21:20NDND12
21:30NDND10
21:40NDND13
21:50NDND14
22:00NDND13
22:10NDND15
22:20NDND18
22:30NDND19
22:40NDND20
22:50NDND17
23:00NDND17
23:10NDND19
23:20NDND21
23:30NDND20
23:40NDND19
23:50NDND18