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

○Information

○Measurement value list ： 2026/03/12(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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