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

○Information

○Measurement value list ： 2026/02/21(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	3.6	south-southwest	0.6
00:10	3.7	-	CALM
00:20	3.6	west	1.2
00:30	3.7	west	1.3
00:40	3.8	west-southwest	0.7
00:50	3.8	west-southwest	1.1
01:00	3.8	west-southwest	1.0
01:10	3.7	southwest	1.2
01:20	3.7	west-southwest	0.8
01:30	3.8	southwest	1.5
01:40	3.7	west-southwest	1.9
01:50	3.7	west-southwest	1.7
02:00	3.7	southwest	2.3
02:10	3.8	west-southwest	2.8
02:20	3.6	west-southwest	2.8
02:30	3.7	west	2.5
02:40	3.9	west	2.3
02:50	3.7	west-southwest	2.4
03:00	3.7	west	2.2
03:10	3.7	west	2.0
03:20	3.5	west-northwest	1.7
03:30	3.7	northwest	1.4
03:40	3.8	north-northwest	1.8
03:50	3.7	north-northwest	2.1
04:00	3.7	northwest	2.9
04:10	3.6	west-northwest	2.8
04:20	3.7	northwest	2.6
04:30	3.8	northwest	4.6
04:40	3.6	north-northwest	4.5
04:50	3.7	northwest	3.8
05:00	3.8	north-northwest	3.5
05:10	3.6	north-northwest	4.3
05:20	3.7	north-northwest	4.7
05:30	3.6	northwest	4.0
05:40	3.6	northwest	4.2
05:50	3.6	northwest	3.8
06:00	3.8	northwest	3.6
06:10	3.8	northwest	3.8
06:20	3.6	northwest	3.8
06:30	3.6	north-northwest	3.8
06:40	3.6	north-northwest	3.5
06:50	3.7	north-northwest	3.9
07:00	3.8	north-northwest	3.4
07:10	3.6	north-northwest	3.6
07:20	3.8	north-northwest	3.8
07:30	3.7	north-northwest	3.8
07:40	3.6	north-northwest	3.4
07:50	3.6	north-northwest	3.3
08:00	3.6	north	2.5
08:10	3.6	north-northeast	1.9
08:20	3.6	north	2.4
08:30	3.7	north	3.0
08:40	3.6	north-northwest	1.7
08:50	3.7	north	2.3
09:00	3.6	north-northeast	2.7
09:10	3.8	north-northeast	2.6
09:20	3.7	northwest	2.0
09:30	3.9	northwest	2.2
09:40	3.7	north-northeast	2.6
09:50	3.8	northeast	2.0
10:00	3.8	northeast	2.8
10:10	3.9	northeast	3.9
10:20	3.6	northeast	3.4
10:30	3.5	northeast	3.5
10:40	3.6	east-northeast	2.9
10:50	3.7	east-northeast	3.0
11:00	3.7	east	3.0
11:10	3.8	east	2.7
11:20	3.7	east	3.0
11:30	3.7	east	2.6
11:40	3.8	east-northeast	2.3
11:50	3.9	east-northeast	2.3
12:00	3.7	east	2.3
12:10	3.7	east-northeast	2.3
12:20	3.8	east	2.5
12:30	3.8	east	2.4
12:40	3.8	east-southeast	2.6
12:50	3.6	east-southeast	3.0
13:00	3.6	east	2.9
13:10	3.8	east-southeast	2.8
13:20	3.8	east-southeast	1.7
13:30	3.9	east	2.2
13:40	3.6	east	2.2
13:50	3.8	east-southeast	2.4
14:00	3.8	east	1.9
14:10	3.8	east-northeast	2.7
14:20	3.8	east-northeast	2.4
14:30	3.8	east	2.9
14:40	3.7	east-northeast	2.5
14:50	3.6	east-northeast	2.8
15:00	3.6	east-northeast	2.2
15:10	3.6	east-northeast	2.2
15:20	3.7	east	2.0
15:30	3.6	east-northeast	2.4
15:40	3.7	east	2.1
15:50	3.7	east	1.9
16:00	3.8	east	2.0
16:10	3.6	east-northeast	2.2
16:20	3.6	east-northeast	1.5
16:30	3.6	east	1.5
16:40	3.7	east-northeast	1.2
16:50	3.5	east-northeast	1.2
17:00	3.7	east	0.7
17:10	3.8	east-southeast	0.7
17:20	3.7	east	0.6
17:30	3.8	-	CALM
17:40	3.8	-	CALM
17:50	3.8	-	CALM
18:00	3.7	-	CALM
18:10	3.7	-	CALM
18:20	3.8	south-southwest	0.6
18:30	3.8	southwest	0.6
18:40	3.5	west	0.6
18:50	3.8	southwest	0.6
19:00	3.6	-	CALM
19:10	3.8	-	CALM
19:20	3.7	-	CALM
19:30	3.8	southwest	0.6
19:40	3.8	southwest	0.9
19:50	3.6	west-southwest	0.9
20:00	3.7	west-southwest	1.1
20:10	3.6	southwest	0.8
20:20	3.6	south-southwest	0.8
20:30	3.7	southwest	1.0
20:40	3.6	southwest	0.9
20:50	3.7	southwest	0.8
21:00	3.8	-	CALM
21:10	3.7	-	CALM
21:20	3.7	-	CALM
21:30	3.7	-	CALM
21:40	3.8	south	0.9
21:50	3.6	southeast	1.2
22:00	3.5	south-southeast	1.0
22:10	3.8	south-southeast	1.1
22:20	3.7	south	0.8
22:30	3.7	south-southeast	1.0
22:40	3.7	south	1.4
22:50	3.7	south-southwest	2.0
23:00	3.6	south-southwest	2.0
23:10	3.9	south-southwest	2.2
23:20	3.8	south-southwest	1.4
23:30	3.6	southwest	1.0
23:40	3.9	-	CALM
23:50	3.8	southwest	0.7