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

○Information

○Measurement value list : 2026/10/17(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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