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

○Information

○Measurement value list : 2025/09/22(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND18
00:10NDND18
00:20NDND20
00:30NDND18
00:40NDND15
00:50NDND12
01:00NDND12
01:10NDND12
01:20NDND13
01:30NDND14
01:40NDND16
01:50NDND15
02:00NDND15
02:10NDND16
02:20NDND13
02:30NDND13
02:40NDND15
02:50NDND15
03:00NDND15
03:10NDND15
03:20NDND14
03:30NDND16
03:40NDND13
03:50NDND15
04:00NDND12
04:10NDND12
04:20NDND14
04:30NDND12
04:40NDND15
04:50NDND16
05:00NDND19
05:10NDND19
05:20NDND19
05:30NDND21
05:40NDND20
05:50NDND19
06:00NDND16
06:10NDND15
06:20NDND15
06:30NDND14
06:40NDND12
06:50NDND13
07:00NDND16
07:10NDND14
07:20NDND14
07:30NDND12
07:40NDND14
07:50NDND13
08:00NDND11
08:10NDND12
08:20NDND11
08:30NDND12
08:40NDND12
08:50NDND13
09:00NDND14
09:10NDND17
09:20NDND15
09:30NDND14
09:40NDND15
09:50NDND13
10:00NDND12
10:10NDND10
10:20NDND12
10:30NDND11
10:40NDND12
10:50NDND13
11:00NDND14
11:10NDND15
11:20NDND16
11:30NDND16
11:40NDND15
11:50NDND13
12:00NDND14
12:10NDND14
12:20NDND13
12:30NDND14
12:40NDND15
12:50NDND16
13:00NDND17
13:10NDND18
13:20NDND17
13:30NDND18
13:40NDND17
13:50NDND15
14:00NDND13
14:10NDND10
14:20NDND9.7
14:30NDND10
14:40NDND11
14:50NDND12
15:00NDND13
15:10NDND11
15:20NDND13
15:30NDND12
15:40NDND10
15:50NDND11
16:00NDND13
16:10NDND15
16:20NDND16
16:30NDND16
16:40NDND14
16:50NDND13
17:00NDND8.4
17:10NDNDND
17:20NDNDND
17:30NDNDND
17:40NDNDND
17:50NDNDND
18:00NDND13
18:10NDND14
18:20NDND14
18:30NDND15
18:40NDND16
18:50NDND16
19:00NDND14
19:10NDND13
19:20NDND13
19:30NDND14
19:40NDND13
19:50NDND12
20:00NDND11
20:10NDND11
20:20NDND9.6
20:30NDND8.9
20:40NDND9.9
20:50NDND9.5
21:00NDND9.5
21:10NDND8.9
21:20NDNDND
21:30NDND8.5
21:40NDNDND
21:50NDND9.2
22:00NDND11
22:10NDND11
22:20NDND14
22:30NDND14
22:40NDND12
22:50NDND13
23:00NDND13
23:10NDND12
23:20NDND12
23:30NDND10
23:40NDND14
23:50NDND11