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

○Information

○Measurement value list ： 2026/04/16(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

TimeCs137Cs134Totalβ
00:00NDND16
00:10NDND18
00:20NDND16
00:30NDND17
00:40NDND19
00:50NDND16
01:00NDND17
01:10NDND17
01:20NDND17
01:30NDND19
01:40NDND16
01:50NDND22
02:00NDND21
02:10NDND22
02:20NDND23
02:30NDND21
02:40NDND22
02:50NDND20
03:00NDND21
03:10NDND22
03:20NDND21
03:30NDND21
03:40NDND19
03:50NDND22
04:00NDND24
04:10NDND20
04:20NDND17
04:30NDND17
04:40NDND17
04:50NDND15
05:00NDND12
05:10NDND14
05:20NDND18
05:30NDND16
05:40NDND19
05:50NDND20
06:00NDND19
06:10NDND20
06:20NDND18
06:30NDND19
06:40NDND19
06:50NDND16
07:00NDND18
07:10NDND17
07:20NDND17
07:30NDND18
07:40NDND17
07:50NDND20
08:00NDND18
08:10NDND19
08:20NDND17
08:30NDND18
08:40NDND19
08:50NDND17
09:00NDND18
09:10NDND19
09:20NDND21
09:30NDND21
09:40NDND19
09:50NDND20
10:00NDND21
10:10NDND20
10:20NDND22
10:30NDND20
10:40NDND22
10:50NDND22
11:00NDND22
11:10NDND24
11:20NDND24
11:30NDND23
11:40NDND24
11:50NDND26
12:00NDND25
12:10NDND25
12:20NDND24
12:30NDND24
12:40NDND22
12:50NDND20
13:00NDND22
13:10NDND21
13:20NDND20
13:30NDND18
13:40NDND20
13:50NDND21
14:00NDND19
14:10NDND16
14:20NDND17
14:30NDND17
14:40NDND16
14:50NDND14
15:00NDND14
15:10NDND16
15:20NDND16
15:30NDND16
15:40NDND18
15:50NDND20
16:00NDND17
16:10NDND19
16:20NDND19
16:30NDND21
16:40NDND17
16:50NDND16
17:00NDND18
17:10NDND18
17:20NDND19
17:30NDND19
17:40NDND20
17:50NDND20
18:00NDND21
18:10NDND18
18:20NDND17
18:30NDND15
18:40NDND17
18:50NDND17
19:00NDND16
19:10NDND16
19:20NDND15
19:30NDND16
19:40NDND13
19:50NDND11
20:00NDND10
20:10NDND16
20:20NDND17
20:30NDND19
20:40NDND19
20:50NDND19
21:00NDND19
21:10NDND13
21:20NDND12
21:30NDND9.3
21:40NDND8.6
21:50NDND10
22:00NDND10
22:10NDND10
22:20NDND11
22:30NDND10
22:40NDND12
22:50NDND12
23:00NDND14
23:10NDND16
23:20NDND15
23:30NDND20
23:40NDND21
23:50NDND23