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

○Information

○Measurement value list ： 2025/12/25(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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