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

○Information

○Measurement value list ： 2026/07/20(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	3.6	northwest	1.4
00:10	3.4	northwest	1.7
00:20	3.4	west-northwest	1.4
00:30	3.6	north	0.8
00:40	3.6	-	CALM
00:50	3.5	-	CALM
01:00	3.4	-	CALM
01:10	3.6	southwest	0.8
01:20	3.5	-	CALM
01:30	3.7	southwest	0.9
01:40	3.5	west-southwest	1.6
01:50	3.7	west-southwest	1.8
02:00	3.5	west-southwest	0.8
02:10	3.7	west-southwest	1.2
02:20	3.5	west-southwest	0.7
02:30	3.5	-	CALM
02:40	3.6	west-northwest	0.8
02:50	3.5	-	CALM
03:00	3.5	-	CALM
03:10	3.6	west-southwest	1.0
03:20	3.6	west-southwest	0.9
03:30	3.6	-	CALM
03:40	3.4	west-southwest	1.1
03:50	3.7	-	CALM
04:00	3.5	south-southwest	0.7
04:10	3.5	south-southwest	1.1
04:20	3.7	south-southwest	1.5
04:30	3.5	south-southwest	1.4
04:40	3.5	south-southwest	1.7
04:50	3.5	south-southwest	1.5
05:00	3.5	south-southwest	2.0
05:10	3.6	south-southwest	2.2
05:20	3.4	south	1.4
05:30	3.5	south-southwest	1.4
05:40	3.6	south-southwest	1.6
05:50	3.4	south	2.1
06:00	3.5	south	2.3
06:10	3.5	south	1.4
06:20	3.5	south-southeast	1.6
06:30	3.5	south	1.9
06:40	3.5	south	0.9
06:50	3.6	south-southeast	1.0
07:00	3.5	south	1.4
07:10	3.4	south	1.1
07:20	3.5	south	1.6
07:30	3.6	south-southwest	1.5
07:40	3.6	south-southwest	1.5
07:50	3.8	south-southwest	1.3
08:00	3.6	south-southeast	1.2
08:10	3.6	-	CALM
08:20	3.7	south	0.7
08:30	3.5	east-southeast	1.0
08:40	3.8	southeast	1.0
08:50	3.7	southeast	1.5
09:00	3.5	southeast	2.4
09:10	3.4	south-southeast	2.4
09:20	3.6	south-southeast	2.7
09:30	3.4	south-southeast	1.9
09:40	3.5	south-southeast	1.7
09:50	3.6	south-southeast	3.0
10:00	3.4	south-southeast	2.9
10:10	3.3	south-southeast	3.2
10:20	3.6	southeast	3.2
10:30	3.4	southeast	3.9
10:40	3.5	south-southeast	4.1
10:50	3.5	south-southeast	3.9
11:00	3.5	south-southeast	3.6
11:10	3.5	south-southeast	3.9
11:20	3.5	south-southeast	4.6
11:30	3.6	southeast	3.5
11:40	3.6	southeast	3.5
11:50	3.5	south-southeast	3.8
12:00	3.5	southeast	2.7
12:10	3.5	south-southeast	3.6
12:20	3.5	southeast	4.1
12:30	3.7	south-southeast	4.0
12:40	3.6	south-southeast	4.1
12:50	3.8	south-southeast	4.4
13:00	3.4	south-southeast	4.0
13:10	3.4	south-southeast	4.2
13:20	3.5	southeast	3.7
13:30	3.5	south-southeast	4.8
13:40	3.6	south-southeast	3.4
13:50	3.6	southeast	3.3
14:00	3.5	south-southeast	3.4
14:10	3.6	south-southeast	3.9
14:20	3.5	south-southeast	4.3
14:30	3.6	south-southeast	4.1
14:40	3.4	south-southeast	4.2
14:50	3.5	south-southeast	4.5
15:00	3.4	south	4.5
15:10	3.4	south	4.8
15:20	3.5	south-southeast	4.9
15:30	3.7	south-southeast	4.5
15:40	3.7	south-southeast	4.5
15:50	3.6	south-southeast	3.8
16:00	3.6	south-southeast	3.8
16:10	3.6	south-southeast	4.9
16:20	3.5	south	4.3
16:30	3.4	south	4.0
16:40	3.6	south	4.4
16:50	3.6	south	4.9
17:00	3.6	south	4.1
17:10	3.4	south	3.7
17:20	3.5	south	3.2
17:30	3.6	south	3.0
17:40	3.4	south	3.3
17:50	3.6	south	2.4
18:00	3.6	south-southeast	1.8
18:10	3.5	south-southeast	1.7
18:20	3.5	south	1.6
18:30	3.5	south	1.2
18:40	3.6	south	1.1
18:50	3.5	south-southwest	0.9
19:00	3.5	west-southwest	0.9
19:10	3.6	west-southwest	1.7
19:20	3.4	west	1.7
19:30	3.6	west-northwest	2.0
19:40	3.6	northwest	1.9
19:50	3.6	northwest	2.8
20:00	3.7	northwest	2.0
20:10	3.7	northwest	2.0
20:20	3.6	west-northwest	2.7
20:30	3.4	west-northwest	2.0
20:40	3.4	southwest	1.1
20:50	3.7	southwest	1.7
21:00	3.5	west-southwest	2.6
21:10	3.6	west	2.2
21:20	3.5	west	2.9
21:30	3.6	west	2.8
21:40	3.6	west	2.5
21:50	3.6	west-northwest	2.5
22:00	3.6	northwest	2.5
22:10	3.4	west-northwest	3.5
22:20	3.5	west-northwest	4.8
22:30	3.6	northwest	5.8
22:40	3.6	west-northwest	5.7
22:50	3.6	west-northwest	5.3
23:00	3.7	west-northwest	3.3
23:10	3.5	west	2.4
23:20	3.6	west-northwest	1.8
23:30	3.5	west-northwest	3.6
23:40	3.6	west-northwest	3.4
23:50	3.6	west-northwest	2.8