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

○Information

○Measurement value list : 2025/09/23(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND8.6
00:10NDND10
00:20NDND13
00:30NDND13
00:40NDND11
00:50NDND13
01:00NDND16
01:10NDND16
01:20NDND13
01:30NDND14
01:40NDND15
01:50NDND13
02:00NDND12
02:10NDND11
02:20NDND13
02:30NDND11
02:40NDND11
02:50NDND13
03:00NDND13
03:10NDND15
03:20NDND14
03:30NDND17
03:40NDND18
03:50NDND17
04:00NDND16
04:10NDND15
04:20NDND16
04:30NDND15
04:40NDND14
04:50NDND17
05:00NDND20
05:10NDND18
05:20NDND15
05:30NDND17
05:40NDND18
05:50NDND14
06:00NDND10
06:10NDND12
06:20NDND14
06:30NDND13
06:40NDND12
06:50NDND12
07:00NDND12
07:10NDND15
07:20NDND15
07:30NDND13
07:40NDND13
07:50NDND15
08:00NDND16
08:10NDND14
08:20NDND12
08:30NDND13
08:40NDND12
08:50NDND8.9
09:00NDND11
09:10NDND11
09:20NDND13
09:30NDND13
09:40NDND15
09:50NDND17
10:00NDND15
10:10NDND15
10:20NDND14
10:30NDND14
10:40NDND12
10:50NDND12
11:00NDND14
11:10NDND13
11:20NDND13
11:30NDND13
11:40NDND11
11:50NDND9.6
12:00NDND8.4
12:10NDND8.8
12:20NDND9.0
12:30NDND8.9
12:40NDND13
12:50NDND12
13:00NDND14
13:10NDND14
13:20NDND14
13:30NDND14
13:40NDND12
13:50NDND13
14:00NDND12
14:10NDND11
14:20NDND8.8
14:30NDND9.6
14:40NDND10
14:50NDND10
15:00NDNDND
15:10NDND9.7
15:20NDND13
15:30NDND14
15:40NDND15
15:50NDND16
16:00NDND18
16:10NDND17
16:20NDND17
16:30NDND16
16:40NDND15
16:50NDND15
17:00NDND16
17:10NDND16
17:20NDND14
17:30NDND14
17:40NDND14
17:50NDND14
18:00NDND13
18:10NDND11
18:20NDND10
18:30NDND11
18:40NDND12
18:50NDND11
19:00NDND15
19:10NDND18
19:20NDND17
19:30NDND18
19:40NDND16
19:50NDND18
20:00NDND17
20:10NDND14
20:20NDND18
20:30NDND14
20:40NDND13
20:50NDND11
21:00NDND10
21:10NDND12
21:20NDND11
21:30NDND10
21:40NDND11
21:50NDND11
22:00NDND10
22:10NDNDND
22:20NDNDND
22:30NDNDND
22:40NDNDND
22:50NDND9.2
23:00NDND9.6
23:10NDND11
23:20NDND11
23:30NDND12
23:40NDND12
23:50NDND12