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

○Information

○Measurement value list ： 2026/05/07(CSV Download)

Radioactivity Concentration Unit:Bq/L

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

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