Radiation Dose measured at exhaust stack monitor of Fukushima Daiichi Nuclear Power Station

○Information

○Measurement value list ： 2025/12/20(CSV Download)

Stack Unit：cps　Wind Velocity Unit：m/s

※"-": the wind velocity is below 0.5m/s

Time	Unit 5,6 joint stack	Wind Direction	Wind Velocity
00:00	3.8	south-southwest	5.4
00:10	3.6	south-southwest	4.9
00:20	3.7	south-southwest	5.9
00:30	3.7	southwest	5.5
00:40	3.6	south-southwest	4.9
00:50	3.7	south-southwest	4.0
01:00	3.4	south-southwest	4.2
01:10	3.7	south-southwest	4.0
01:20	3.6	south-southwest	4.4
01:30	3.6	south-southwest	4.6
01:40	3.7	south-southwest	6.3
01:50	3.6	south	5.0
02:00	3.6	south	5.2
02:10	3.6	south	5.5
02:20	3.7	south-southwest	3.3
02:30	3.6	south	3.4
02:40	3.6	south	5.8
02:50	3.7	south-southeast	4.3
03:00	3.7	south-southeast	2.7
03:10	3.7	southeast	1.6
03:20	3.6	southeast	0.6
03:30	3.6	east	1.9
03:40	3.6	-	CALM
03:50	3.7	southeast	1.7
04:00	3.6	south-southeast	1.2
04:10	3.6	south-southeast	0.9
04:20	3.6	east-southeast	1.1
04:30	3.5	-	CALM
04:40	3.6	-	CALM
04:50	3.6	-	CALM
05:00	3.8	southeast	0.6
05:10	3.7	south-southeast	1.2
05:20	3.6	southeast	2.0
05:30	3.6	south-southeast	2.3
05:40	3.7	southeast	1.7
05:50	3.6	south-southeast	2.1
06:00	3.6	south	2.7
06:10	3.7	south-southeast	1.6
06:20	3.7	south-southeast	0.8
06:30	3.5	east-northeast	1.2
06:40	3.9	east-southeast	1.3
06:50	3.7	southeast	1.5
07:00	3.8	south-southeast	1.8
07:10	3.6	southeast	2.6
07:20	3.7	southeast	3.5
07:30	3.5	east-southeast	3.4
07:40	3.7	southeast	4.0
07:50	3.6	southeast	3.8
08:00	3.8	south-southeast	3.8
08:10	3.7	southeast	3.5
08:20	3.7	southeast	3.2
08:30	3.6	southeast	3.3
08:40	3.5	southeast	4.7
08:50	3.7	southeast	3.8
09:00	3.6	south-southeast	3.8
09:10	3.6	south-southeast	3.3
09:20	3.6	south	2.8
09:30	3.6	south-southeast	2.8
09:40	3.5	southeast	2.8
09:50	3.6	southeast	3.6
10:00	3.7	south	5.1
10:10	3.7	south-southwest	4.5
10:20	3.6	south	4.7
10:30	3.6	south-southeast	2.7
10:40	3.8	south-southeast	3.0
10:50	3.6	south-southwest	4.0
11:00	3.7	south-southwest	3.3
11:10	3.6	south-southwest	3.6
11:20	3.6	southwest	6.2
11:30	3.7	southwest	4.5
11:40	3.6	south-southwest	4.9
11:50	3.7	west-southwest	5.5
12:00	3.6	south-southwest	4.0
12:10	3.8	southwest	5.1
12:20	3.8	south-southwest	3.0
12:30	3.8	south-southwest	3.8
12:40	3.6	south-southwest	2.1
12:50	3.7	south-southwest	3.9
13:00	3.8	-	CALM
13:10	3.8	-	CALM
13:20	3.7	south	0.7
13:30	3.6	south-southeast	1.9
13:40	3.7	west-southwest	1.1
13:50	3.7	northwest	1.0
14:00	3.8	west-southwest	2.3
14:10	3.7	west-southwest	0.8
14:20	3.7	north-northwest	0.7
14:30	3.6	west-southwest	1.5
14:40	3.6	west-northwest	0.9
14:50	3.8	west-southwest	1.1
15:00	3.7	south-southwest	0.6
15:10	3.6	south-southwest	1.1
15:20	3.6	-	CALM
15:30	3.6	-	CALM
15:40	3.7	-	CALM
15:50	3.7	-	CALM
16:00	3.6	southwest	1.6
16:10	3.6	southeast	1.6
16:20	3.8	south-southwest	2.5
16:30	3.8	south	2.8
16:40	3.7	south-southwest	2.8
16:50	3.7	south-southwest	2.5
17:00	3.5	south	2.9
17:10	3.7	south	3.3
17:20	3.7	south-southwest	2.4
17:30	3.8	southwest	2.8
17:40	3.8	southwest	5.3
17:50	3.6	west-southwest	3.8
18:00	3.6	west-southwest	2.3
18:10	3.6	west-southwest	3.0
18:20	3.9	west-southwest	3.0
18:30	3.8	southwest	1.5
18:40	3.6	west-southwest	1.6
18:50	3.6	southwest	2.4
19:00	3.6	south-southwest	1.3
19:10	3.7	south-southwest	3.6
19:20	3.8	southwest	1.8
19:30	3.8	south-southwest	2.5
19:40	3.7	southwest	2.2
19:50	3.6	west-southwest	2.9
20:00	3.6	west-southwest	3.4
20:10	3.5	west-southwest	4.1
20:20	3.6	west	3.5
20:30	3.8	southwest	4.4
20:40	3.7	southwest	3.6
20:50	3.7	southwest	3.9
21:00	3.6	west-southwest	2.9
21:10	3.6	southwest	2.7
21:20	3.6	south-southwest	1.0
21:30	3.8	-	CALM
21:40	3.7	south-southwest	4.2
21:50	3.4	south	3.3
22:00	3.5	south	6.2
22:10	3.6	south	6.7
22:20	3.7	south	5.6
22:30	3.6	south	5.0
22:40	3.7	south	5.0
22:50	3.5	south	6.6
23:00	3.7	south	6.4
23:10	3.8	south	5.1
23:20	3.6	south	5.6
23:30	3.4	south	5.8
23:40	3.6	south	5.7
23:50	3.5	south-southeast	5.4