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

○Information

○Measurement value list ： 2026/09/18(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND16
00:10NDND13
00:20NDND13
00:30NDND13
00:40NDND13
00:50NDND14
01:00NDND14
01:10NDND16
01:20NDND18
01:30NDND16
01:40NDND14
01:50NDND12
02:00NDNDND
02:10NDNDND
02:20NDNDND
02:30NDNDND
02:40NDNDND
02:50NDNDND
03:00NDNDND
03:10NDNDND
03:20NDNDND
03:30NDND9.5
03:40NDNDND
03:50NDNDND
04:00NDND8.5
04:10NDNDND
04:20NDND8.4
04:30NDNDND
04:40NDNDND
04:50NDNDND
05:00NDNDND
05:10NDND10
05:20NDND8.4
05:30NDND9.2
05:40NDND8.6
05:50NDND11
06:00NDND9.0
06:10NDND10
06:20NDND12
06:30NDND11
06:40NDND14
06:50NDND16
07:00NDND17
07:10NDND16
07:20NDND15
07:30NDND16
07:40NDND14
07:50NDND13
08:00NDND14
08:10NDND13
08:20NDND13
08:30NDND9.0
08:40NDNDND
08:50NDNDND
09:00NDNDND
09:10NDNDND
09:20NDNDND
09:30NDNDND
09:40NDND9.2
09:50NDND8.8
10:00NDND11
10:10NDNDND
10:20NDND10
10:30NDND11
10:40NDND11
10:50NDND13
11:00NDND10
11:10NDND11
11:20NDND10
11:30NDNDND
11:40NDND10
11:50NDND11
12:00NDND13
12:10NDND14
12:20NDND15
12:30NDND15
12:40NDND12
12:50NDND11
13:00NDND9.7
13:10NDND11
13:20NDND10
13:30NDNDND
13:40NDND9.6
13:50NDND11
14:00NDND12
14:10NDND13
14:20NDND13
14:30NDND14
14:40NDND14
14:50NDND14
15:00NDND13
15:10NDND11
15:20NDND11
15:30NDND12
15:40NDNDND
15:50NDNDND
16:00NDNDND
16:10NDNDND
16:20NDNDND
16:30NDND8.6
16:40NDND13
16:50NDND15
17:00NDND16
17:10NDND15
17:20NDND17
17:30NDND14
17:40NDND12
17:50NDND13
18:00NDND14
18:10NDND13
18:20NDND13
18:30NDND13
18:40NDND14
18:50NDND12
19:00NDND9.5
19:10NDND9.0
19:20NDND10
19:30NDND13
19:40NDND14
19:50NDND15
20:00NDND15
20:10NDND14
20:20NDND13
20:30NDND9.3
20:40NDND9.2
20:50NDNDND
21:00NDNDND
21:10NDND9.3
21:20NDND10
21:30NDND14
21:40NDND13
21:50NDND16
22:00NDND18
22:10NDND17
22:20NDND13
22:30NDND9.6
22:40NDND9.3
22:50NDNDND
23:00NDNDND
23:10NDNDND
23:20NDND8.6
23:30NDND9.0
23:40NDND9.2
23:50NDNDND