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

○Information

○Measurement value list ： 2025/11/25(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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