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

○Information

○Measurement value list : 2026/08/21(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND12
00:10NDND11
00:20NDND13
00:30NDND12
00:40NDND11
00:50NDND11
01:00NDND14
01:10NDND15
01:20NDND16
01:30NDND13
01:40NDND14
01:50NDND13
02:00NDND9.0
02:10NDND9.7
02:20NDND10
02:30NDND11
02:40NDND12
02:50NDND15
03:00NDND19
03:10NDND17
03:20NDND18
03:30NDND20
03:40NDND21
03:50NDND18
04:00NDND16
04:10NDND16
04:20NDND16
04:30NDND14
04:40NDND12
04:50NDND12
05:00NDND12
05:10NDND13
05:20NDND11
05:30NDND11
05:40NDND12
05:50NDND12
06:00NDND12
06:10NDND10
06:20NDND12
06:30NDND13
06:40NDND12
06:50NDND14
07:00NDND15
07:10NDND15
07:20NDND13
07:30NDND16
07:40NDND17
07:50NDND14
08:00NDND13
08:10NDND15
08:20NDND16
08:30NDND14
08:40NDND16
08:50NDND19
09:00NDND19
09:10NDND16
09:20NDND15
09:30NDND13
09:40NDND11
09:50NDND8.9
10:00NDND10
10:10NDND10
10:20NDND12
10:30NDND12
10:40NDND8.4
10:50NDND8.4
11:00NDNDND
11:10NDNDND
11:20NDNDND
11:30NDNDND
11:40NDND8.8
11:50NDND9.7
12:00NDND10
12:10NDND11
12:20NDND12
12:30NDND17
12:40NDND18
12:50NDND18
13:00NDND18
13:10NDND18
13:20NDND18
13:30NDND16
13:40NDND16
13:50NDND12
14:00NDND14
14:10NDND14
14:20NDND14
14:30NDND15
14:40NDND14
14:50NDND17
15:00NDND14
15:10NDND16
15:20NDND16
15:30NDND18
15:40NDND18
15:50NDND19
16:00NDND18
16:10NDND17
16:20NDND16
16:30NDND14
16:40NDND14
16:50NDND17
17:00NDND16
17:10NDND18
17:20NDND19
17:30NDND20
17:40NDND18
17:50NDND16
18:00NDND18
18:10NDND15
18:20NDND14
18:30NDND12
18:40NDND12
18:50NDND12
19:00NDND9.6
19:10NDND11
19:20NDND12
19:30NDND12
19:40NDND12
19:50NDND13
20:00NDND13
20:10NDND13
20:20NDND14
20:30NDND13
20:40NDND14
20:50NDND13
21:00NDND15
21:10NDND14
21:20NDND16
21:30NDND18
21:40NDND17
21:50NDND14
22:00NDND13
22:10NDND12
22:20NDND12
22:30NDND11
22:40NDND10
22:50NDND12
23:00NDND13
23:10NDND12
23:20NDND12
23:30NDND12
23:40NDND13
23:50NDND13