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

○Information

○Measurement value list ： 2025/09/20(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND11
00:10NDND9.7
00:20NDND10
00:30NDNDND
00:40NDNDND
00:50NDND9.3
01:00NDNDND
01:10NDND8.9
01:20NDND8.8
01:30NDND12
01:40NDND14
01:50NDND12
02:00NDND11
02:10NDND12
02:20NDNDND
02:30NDND9.3
02:40NDND8.5
02:50NDNDND
03:00NDND10
03:10NDND9.3
03:20NDND10
03:30NDND9.3
03:40NDND12
03:50NDND13
04:00NDND14
04:10NDND15
04:20NDND13
04:30NDND12
04:40NDND11
04:50NDND12
05:00NDND12
05:10NDND13
05:20NDND17
05:30NDND20
05:40NDND20
05:50NDND18
06:00NDND17
06:10NDND14
06:20NDND14
06:30NDND12
06:40NDND13
06:50NDND16
07:00NDND15
07:10NDND15
07:20NDND16
07:30NDND17
07:40NDND17
07:50NDND17
08:00NDND17
08:10NDND18
08:20NDND15
08:30NDND15
08:40NDND14
08:50NDND15
09:00NDND17
09:10NDND17
09:20NDND16
09:30NDND17
09:40NDND16
09:50NDND12
10:00NDND13
10:10NDND11
10:20NDND13
10:30NDND12
10:40NDND13
10:50NDND14
11:00NDND12
11:10NDND13
11:20NDND12
11:30NDND9.3
11:40NDND10
11:50NDND9.7
12:00NDND9.7
12:10NDND10
12:20NDND12
12:30NDND15
12:40NDND14
12:50NDND15
13:00NDND14
13:10NDND14
13:20NDND14
13:30NDND13
13:40NDND14
13:50NDND16
14:00NDND16
14:10NDND17
14:20NDND18
14:30NDND19
14:40NDND19
14:50NDND19
15:00NDND18
15:10NDND17
15:20NDND15
15:30NDND12
15:40NDND12
15:50NDND12
16:00NDND13
16:10NDND14
16:20NDND15
16:30NDND19
16:40NDND19
16:50NDND20
17:00NDND19
17:10NDND18
17:20NDND19
17:30NDND20
17:40NDND22
17:50NDND20
18:00NDND21
18:10NDND23
18:20NDND20
18:30NDND18
18:40NDND16
18:50NDND16
19:00NDND16
19:10NDND12
19:20NDND12
19:30NDND11
19:40NDND10
19:50NDND10
20:00NDND9.3
20:10NDND10
20:20NDND13
20:30NDND14
20:40NDND16
20:50NDND13
21:00NDND14
21:10NDND14
21:20NDND10
21:30NDND10
21:40NDND8.6
21:50NDND8.5
22:00NDND9.2
22:10NDND9.0
22:20NDND11
22:30NDND12
22:40NDND13
22:50NDND14
23:00NDND15
23:10NDND14
23:20NDND14
23:30NDND14
23:40NDND16
23:50NDND18