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

○Information

○Measurement value list ： 2026/06/20(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND19
00:10NDND19
00:20NDND18
00:30NDND20
00:40NDND20
00:50NDND15
01:00NDND14
01:10NDND15
01:20NDND15
01:30NDND13
01:40NDND12
01:50NDND14
02:00NDND13
02:10NDND13
02:20NDND12
02:30NDND10
02:40NDND11
02:50NDND10
03:00NDND15
03:10NDND16
03:20NDND18
03:30NDND18
03:40NDND16
03:50NDND17
04:00NDND16
04:10NDND13
04:20NDND15
04:30NDND16
04:40NDND14
04:50NDND15
05:00NDND15
05:10NDND17
05:20NDND16
05:30NDND19
05:40NDND20
05:50NDND18
06:00NDND18
06:10NDND17
06:20NDND14
06:30NDND12
06:40NDND11
06:50NDND10
07:00NDND8.4
07:10NDND11
07:20NDND12
07:30NDND13
07:40NDND15
07:50NDND15
08:00NDND15
08:10NDND15
08:20NDND15
08:30NDND16
08:40NDND14
08:50NDND14
09:00NDND13
09:10NDND13
09:20NDND12
09:30NDND14
09:40NDND16
09:50NDND18
10:00NDND17
10:10NDND19
10:20NDND21
10:30NDND18
10:40NDND18
10:50NDND18
11:00NDND17
11:10NDND16
11:20NDND15
11:30NDND14
11:40NDND13
11:50NDND14
12:00NDND16
12:10NDND16
12:20NDND14
12:30NDND17
12:40NDND20
12:50NDND19
13:00NDND21
13:10NDND18
13:20NDND22
13:30NDND19
13:40NDND17
13:50NDND18
14:00NDND17
14:10NDND19
14:20NDND16
14:30NDND18
14:40NDND18
14:50NDND18
15:00NDND22
15:10NDND22
15:20NDND24
15:30NDND24
15:40NDND23
15:50NDND22
16:00NDND18
16:10NDND19
16:20NDND16
16:30NDND14
16:40NDND17
16:50NDND18
17:00NDND20
17:10NDND20
17:20NDND21
17:30NDND20
17:40NDND16
17:50NDND16
18:00NDND15
18:10NDND14
18:20NDND12
18:30NDND16
18:40NDND18
18:50NDND18
19:00NDND20
19:10NDND22
19:20NDND22
19:30NDND21
19:40NDND20
19:50NDND18
20:00NDND17
20:10NDND18
20:20NDND19
20:30NDND17
20:40NDND17
20:50NDND17
21:00NDND16
21:10NDND16
21:20NDND15
21:30NDND16
21:40NDND18
21:50NDND15
22:00NDND15
22:10NDND12
22:20NDND12
22:30NDND13
22:40NDND12
22:50NDND15
23:00NDND16
23:10NDND16
23:20NDND16
23:30NDND15
23:40NDND17
23:50NDND16