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

○Information

○Measurement value list ： 2026/05/09(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND24
00:10NDND24
00:20NDND23
00:30NDND22
00:40NDND20
00:50NDND20
01:00NDND18
01:10NDND20
01:20NDND19
01:30NDND21
01:40NDND18
01:50NDND18
02:00NDND20
02:10NDND18
02:20NDND19
02:30NDND20
02:40NDND21
02:50NDND19
03:00NDND22
03:10NDND22
03:20NDND22
03:30NDND20
03:40NDND20
03:50NDND24
04:00NDND22
04:10NDND21
04:20NDND21
04:30NDND23
04:40NDND24
04:50NDND22
05:00NDND23
05:10NDND24
05:20NDND23
05:30NDND19
05:40NDND17
05:50NDND18
06:00NDND16
06:10NDND15
06:20NDND15
06:30NDND17
06:40NDND20
06:50NDND20
07:00NDND22
07:10NDND23
07:20NDND21
07:30NDND19
07:40NDND21
07:50NDND21
08:00NDND20
08:10NDND20
08:20NDND24
08:30NDND24
08:40NDND21
08:50NDND21
09:00NDND22
09:10NDND22
09:20NDND19
09:30NDND18
09:40NDND16
09:50NDND16
10:00NDND14
10:10NDND16
10:20NDND20
10:30NDND19
10:40NDND23
10:50NDND24
11:00NDND24
11:10NDND21
11:20NDND21
11:30NDND25
11:40NDND24
11:50NDND24
12:00NDND25
12:10NDND27
12:20NDND27
12:30NDND26
12:40NDND24
12:50NDND21
13:00NDND20
13:10NDND19
13:20NDND19
13:30NDND20
13:40NDND21
13:50NDND24
14:00NDND24
14:10NDND23
14:20NDND22
14:30NDND22
14:40NDND21
14:50NDND20
15:00NDND18
15:10NDND20
15:20NDND21
15:30NDND20
15:40NDND20
15:50NDND19
16:00NDND21
16:10NDND23
16:20NDND23
16:30NDND24
16:40NDND22
16:50NDND22
17:00NDND23
17:10NDND23
17:20NDND23
17:30NDND22
17:40NDND25
17:50NDND24
18:00NDND20
18:10NDND18
18:20NDND17
18:30NDND15
18:40NDND14
18:50NDND13
19:00NDND13
19:10NDND13
19:20NDND13
19:30NDND16
19:40NDND14
19:50NDND16
20:00NDND17
20:10NDND17
20:20NDND19
20:30NDND19
20:40NDND21
20:50NDND20
21:00NDND19
21:10NDND18
21:20NDND16
21:30NDND16
21:40NDND17
21:50NDND17
22:00NDND17
22:10NDND18
22:20NDND16
22:30NDND17
22:40NDND14
22:50NDND14
23:00NDND16
23:10NDND15
23:20NDND14
23:30NDND15
23:40NDND18
23:50NDND20