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

○Information

○Measurement value list : 2025/10/21(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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