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

○Information

○Measurement value list ： 2026/10/22(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND16
00:10NDND16
00:20NDND17
00:30NDND17
00:40NDND17
00:50NDND20
01:00NDND21
01:10NDND18
01:20NDND18
01:30NDND21
01:40NDND19
01:50NDND20
02:00NDND19
02:10NDND19
02:20NDND18
02:30NDND13
02:40NDND14
02:50NDND15
03:00NDND15
03:10NDND17
03:20NDND17
03:30NDND19
03:40NDND17
03:50NDND13
04:00NDND11
04:10NDND8.6
04:20NDND12
04:30NDND14
04:40NDND13
04:50NDND17
05:00NDND15
05:10NDND14
05:20NDND10
05:30NDND9.5
05:40NDND11
05:50NDND9.6
06:00NDND14
06:10NDND14
06:20NDND15
06:30NDND18
06:40NDND18
06:50NDND19
07:00NDND18
07:10NDND21
07:20NDND24
07:30NDND20
07:40NDND23
07:50NDND23
08:00NDND26
08:10NDND24
08:20NDND22
08:30NDND22
08:40NDND16
08:50NDND16
09:00NDND14
09:10NDND16
09:20NDND16
09:30NDND17
09:40NDND19
09:50NDND19
10:00NDND19
10:10NDND16
10:20NDND18
10:30NDND20
10:40NDND21
10:50NDND19
11:00NDND17
11:10NDND16
11:20NDND14
11:30NDND13
11:40NDND10
11:50NDND10
12:00NDND12
12:10NDND16
12:20NDND17
12:30NDND18
12:40NDND16
12:50NDND18
13:00NDND19
13:10NDND17
13:20NDND17
13:30NDND17
13:40NDND20
13:50NDND19
14:00NDND16
14:10NDND16
14:20NDND13
14:30NDND13
14:40NDND12
14:50NDND13
15:00NDND13
15:10NDND14
15:20NDND16
15:30NDND16
15:40NDND14
15:50NDND15
16:00NDND16
16:10NDND13
16:20NDND13
16:30NDND14
16:40NDND16
16:50NDND16
17:00NDND16
17:10NDND16
17:20NDND16
17:30NDND14
17:40NDND14
17:50NDND10
18:00NDND12
18:10NDND12
18:20NDND11
18:30NDND12
18:40NDND13
18:50NDND14
19:00NDND14
19:10NDND14
19:20NDND14
19:30NDND14
19:40NDND13
19:50NDND11
20:00NDND10
20:10NDND14
20:20NDND13
20:30NDND13
20:40NDND11
20:50NDND13
21:00NDND14
21:10NDND13
21:20NDND12
21:30NDND13
21:40NDND16
21:50NDND16
22:00NDND17
22:10NDND17
22:20NDND20
22:30NDND19
22:40NDND18
22:50NDND19
23:00NDND18
23:10NDND15
23:20NDND12
23:30NDND12
23:40NDND11
23:50NDND10