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

○Information

○Measurement value list ： 2026/04/20(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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