Observation log for Wolf Sunspot Number - 2021

Back to previous page

---

January 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02	10:44	1.4	-3.2	266.0	0	0	2	3	0	23	23
03	10:46	1.0	-3.3	252.8	0	0	1	1	0	11	11
04	10:41	0.5	-3.4	239.7	0	0	1	0	0	10	10
05
06
07
08
09	9:23	-1.9	-3.9	174.5	0	0	0	0	0	0	0
10	11:05	-2.4	-4.1	160.4	0	0	0	0	0	0	0
11
12
13	7:51	-3.8	-4.4	122.7	0	0	0	0	0	0	0
14
15
16	12:40	-5.3	-4.7	80.6	0	0	1	4	0	14	14
17
18
19	7:58	-6.6	-4.9	43.7	0	0	2	4	0	24	24
20	7:54	-7.0	-5.0	30.6	0	0	3	5	0	35	35
21
22	8:15	-8.0	-5.2	4.0	0	0	2	4	0	24	24
23
24
25	7:54	-9.3	-5.5	324.7	1	3	2	2	13	22	35
26
27
28
29	9:48	-11.0	-5.8	271.0	1	0	1	1	10	11	21
30
31	9:38	-11.8	-6.0	244.7	1	0	0	0	10	0	10
Monthly mean					0.2	0.2	1.2	1.8	2.5	13.4	15.9
February 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02	11:55	-12.7	-6.1	217.2	1	3	0	0	13	0	13
03	7:51	-13.0	-6.2	206.2	1	1	0	0	11	0	11
04	7:52	-13.4	-6.2	193.1	1	0	0	0	10	0	10
05
06	13:01	-14.3	-6.4	163.9	0	0	0	0	0	0	0
07
08
09	7:53	-15.3	-6.5	127.2	0	0	1	2	0	12	12
10	7:53	-15.7	-6.6	114.1	0	0	1	1	0	11	11
11	9:57	-16.1	-6.7	99.8	0	0	1	0	0	10	10
12
13	13:16	-16.8	-6.8	71.6	0	0	1	0	0	10	10
14
15
16	9:19	-17.8	-6.9	34.2	0	0	0	0	0	0	0
17
18
19	10:24	-18.8	-7.0	354.2	2	4	0	0	24	0	24
20	10:57	-19.1	-7.0	340.7	2	3	0	0	23	0	23
21	15:00	-19.4	-7.1	325.3	1	2	0	0	12	0	12
22
23	9:47	-20.0	-7.1	301.8	2	9	1	7	29	17	46
24	7:54	-20.2	-7.1	289.7	2	8	1	5	28	15	43
25
26
27	11:42	-21.1	-7.2	248.1	2	4	1	0	24	10	34
28	9:48	-21.3	-7.2	236.0	2	8	1	0	28	10	38
Monthly mean					1.0	2.6	0.5	0.9	12.6	5.9	18.6
March 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02
03	7:57	-22.0	-7.2	197.5	0	0	2	11	0	31	31
04	7:57	-22.3	-7.3	184.3	0	0	2	16	0	36	36
05
06
07
08
09	13:12	-23.4	-7.2	115.5	0	0	2	3	0	23	23
10
11	8:00	-23.7	-7.2	92.0	1	1	2	2	11	22	33
12
13
14	9:39	-24.3	-7.2	51.6	1	1	1	2	11	12	23
15
16
17	8:06	-24.7	-7.1	12.9	2	3	1	0	23	10	33
18
19
20
21
22
23	8:37	-25.5	-7.0	293.5	3	5	0	0	35	0	35
24
25	8:43	-25.7	-6.9	267.1	3	7	0	0	37	0	37
26
27	8:53	-25.9	-6.8	240.6	3	3	0	0	33	0	33
28
29
30
31
Monthly mean					1.4	2.2	1.1	3.8	16.7	14.9	31.6
April 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02	9:48	-26.2	-6.5	161.0	1	0	0	0	10	0	10
03	9:29	-26.2	-6.4	147.9	1	0	0	0	10	0	10
04
05
06
07	8:45	-26.3	-6.2	95.6	1	1	0	0	11	0	11
08
09	12:05	-26.2	-6.1	67.3	1	0	0	0	10	0	10
10	10:16	-26.2	-6.0	55.1	0	0	0	0	0	0	0
11
12
13
14
15
16
17
18	9:38	-25.8	-5.4	309.9	0	0	3	6	0	36	36
19
20	9:43	-25.6	-5.2	283.4	1	14	4	15	24	55	79
21	7:22	-25.5	-5.1	271.5	1	5	3	8	15	38	53
22	7:20	-25.4	-5.0	258.3	1	5	2	8	15	28	43
23	7:23	-25.3	-4.9	245.1	1	1	2	14	11	34	45
24	9:24	-25.2	-4.8	230.7	1	4	3	16	14	46	60
25
26	7:18	-24.9	-4.7	205.5	1	0	4	22	10	62	72
27	9:28	-24.8	-4.6	191.1	1	0	4	30	10	70	80
28
29
30	9:18	-24.3	-4.3	151.5	0	0	3	6	0	36	36
Monthly mean					0.8	2.1	2.0	8.9	10.0	28.9	38.9
May 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01	9:21	-24.1	-4.2	138.3	0	0	2	2	0	22	22
02
03	13:39	-23.7	-4.0	109.4	0	0	0	0	0	0	0
04
05
06	13:11	-23.1	-3.6	70.0	0	0	0	0	0	0	0
07
08	9:33	-22.7	-3.4	45.6	1	6	0	0	16	0	16
09	10:16	-22.4	-3.3	32.0	1	6	0	0	16	0	16
10
11
12	7:24	-21.7	-3.0	353.9	1	14	1	6	24	16	40
13
14	12:22	-21.2	-2.8	324.8	1	4	1	1	14	11	25
15
16	9:41	-20.6	-2.6	299.7	1	3	1	0	13	10	23
17
18
19
20
21
22
23	13:47	-18.4	-1.7	204.9	2	10	0	0	30	0	30
24
25
26	14:23	-17.4	-1.4	164.9	3	24	0	0	54	0	54
27
28
29
30	12:23	-16.1	-0.9	113.1	3	8	0	0	38	0	38
31
Monthly mean					1.2	6.8	0.5	0.8	18.6	5.4	24.0
June 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02
03	12:23	-14.6	-0.4	60.1	1	11	2	11	21	31	52
04
05
06
07	13:52	-13.0	0.1	6.4	2	4	2	17	24	37	61
08
09	7:22	-12.3	0.3	343.5	0	0	2	18	0	38	38
10	9:57	-11.8	0.4	328.8	1	7	1	4	17	14	31
11	10:14	-11.4	0.5	315.4	1	6	1	2	16	12	28
12	14:26	-10.9	0.7	299.9	1	1	2	0	11	20	31
13
14
15	11:54	-9.7	1.0	261.6	2	1	0	0	21	0	21
16
17
18	10:05	-8.4	1.4	222.9	2	3	0	0	23	0	23
19
20	14:44	-7.4	1.6	193.8	1	4	0	0	14	0	14
21
22
23
24	8:10	-5.8	2.1	144.5	1	1	0	0	11	0	11
25
26	10:21	-4.9	2.3	116.8	0	0	1	7	0	17	17
27
28	7:42	-4.0	2.5	91.8	0	0	2	20	0	40	40
29
30
Monthly mean					1.0	3.2	1.1	6.6	13.2	17.4	30.6
July 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02
03
04
05
06
07
08
09
10
11	9:59	1.9	3.9	278.5	2	1	1	4	21	14	35
12	7:37	2.3	4.0	266.5	2	1	1	2	21	12	33
13
14	7:25	3.2	4.2	240.2	3	6	2	4	36	24	60
15
16	13:01	4.2	4.4	210.6	1	1	2	5	11	25	36
17	12:37	4.6	4.5	197.6	1	8	3	4	18	34	52
18	9:22	5.0	4.6	186.2	1	14	5	15	24	65	89
19	9:52	5.5	4.7	172.7	1	13	3	9	23	39	62
20
21	7:30	6.3	4.9	147.5	3	29	3	5	59	35	94
22	10:03	6.8	5.0	132.9	3	24	4	11	54	51	105
23
24	9:50	7.6	5.2	106.6	2	13	3	3	33	33	66
25	9:47	8.0	5.2	93.4	2	18	3	1	38	31	69
26
27
28	7:37	9.2	5.5	54.9	2	2	2	0	22	20	42
29
30
31	9:37	10.5	5.7	14.1	2	3	2	0	23	20	43
Monthly mean					1.9	10.2	2.6	4.8	29.5	31.0	60.5
August 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01	10:00	10.9	5.8	0.6	1	2	2	0	12	20	32
02
03	6:31	11.6	5.9	336.1	0	0	1	2	0	12	12
04	10:06	12.1	6.0	320.9	0	0	2	8	0	28	28
05	11:22	12.5	6.1	307.0	0	0	2	8	0	28	28
06	9:41	12.8	6.1	294.7	1	3	2	4	13	24	37
07	9:27	13.2	6.2	281.6	1	0	1	0	10	10	20
08
09
10	9:25	14.3	6.4	241.9	2	0	1	0	20	10	30
11	10:46	14.7	6.4	228.0	2	3	2	2	23	22	45
12
13
14
15
16
17
18
19	11:06	17.4	6.8	122.1	4	8	0	0	48	0	48
20	13:12	17.7	6.9	107.7	3	3	0	0	33	0	33
21
22
23
24
25
26
27	9:41	19.8	7.1	17.1	2	13	2	46	33	66	99
28	9:30	20.0	7.1	4.0	2	10	2	46	30	66	96
29
30	9:28	20.6	7.2	337.6	2	3	1	32	23	42	65
31
Monthly mean					1.5	3.5	1.4	11.4	18.8	25.2	44.1
September 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02
03
04
05	14:49	22.1	7.2	255.4	2	12	4	24	32	64	96
06
07	7:24	22.5	7.3	233.1	2	16	3	47	36	77	113
08
09
10	9:19	23.1	7.3	192.4	2	1	5	67	21	117	138
11
12
13
14
15	12:17	24.1	7.2	124.8	0	0	1	2	0	12	12
16	12:40	24.3	7.2	111.3	0	0	0	0	0	0	0
17
18
19	12:48	24.7	7.1	71.7	0	0	2	2	0	22	22
20	8:19	24.8	7.1	60.9	1	5	2	6	15	26	41
21	8:00	25.0	7.1	47.9	2	20	2	11	40	31	71
22
23	14:55	25.3	7.0	17.7	2	23	3	15	43	45	88
24	8:18	25.3	7.0	8.1	2	30	3	16	50	46	96
25	13:41	25.5	7.0	352.0	2	15	3	20	35	50	85
26
27	7:54	25.6	6.9	328.8	3	6	4	28	36	68	104
28
29	7:49	25.8	6.8	302.5	5	12	4	19	62	59	121
30
Monthly mean					1.8	10.8	2.8	19.8	28.5	47.5	75.9
October 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02	8:35	26.0	6.7	262.4	2	11	2	4	31	24	55
03	8:52	26.1	6.6	249.1	2	11	2	2	31	22	53
04
05	7:52	26.2	6.5	223.2	2	15	1	0	35	10	45
06	10:51	26.2	6.5	208.4	2	8	0	0	28	0	28
07
08	7:47	26.3	6.4	183.7	2	7	0	0	27	0	27
09	10:30	26.3	6.3	169.0	2	10	0	0	30	0	30
10	9:25	26.3	6.2	156.4	2	14	0	0	34	0	34
11	12:15	26.3	6.2	141.7	2	10	1	1	30	11	41
12
13
14	7:38	26.2	6.0	104.6	2	7	0	0	27	0	27
15	8:03	26.2	5.9	91.2	2	2	0	0	22	0	22
16
17
18	7:38	26.0	5.7	51.9	0	0	1	1	0	11	11
19
20
21	7:50	25.8	5.4	12.2	0	0	1	1	0	11	11
22
23	8:51	25.7	5.2	345.2	0	0	2	16	0	36	36
24	8:45	25.6	5.1	332.1	0	0	2	22	0	42	42
25
26
27	7:53	25.2	4.9	293.0	1	3	5	52	13	102	115
28	7:52	25.1	4.8	279.8	1	9	5	52	19	102	121
29	9:27	24.9	4.7	265.8	1	9	5	32	19	82	101
30	8:59	24.8	4.6	252.8	2	35	4	33	55	73	128
31
Monthly mean					1.4	8.4	1.7	12.0	22.3	29.2	51.5
November 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01
02
03	8:57	24.1	4.2	200.1	3	15	2	3	45	23	68
04	8:24	23.9	4.1	187.2	3	12	1	0	42	10	52
05	8:11	23.7	4.0	174.2	2	7	1	0	27	10	37
06	10:15	23.5	3.9	159.9	2	7	1	2	27	12	39
07	9:58	23.3	3.8	146.8	3	6	1	7	36	17	53
08
09
10
11	7:33	22.4	3.3	95.4	2	5	1	2	25	12	37
12	8:19	22.2	3.2	81.8	2	10	1	3	30	13	43
13	10:04	21.9	3.1	67.7	1	6	2	16	16	36	52
14	9:18	21.6	3.0	54.9	1	1	1	2	11	12	23
15	9:38	21.3	2.9	41.5	1	0	2	3	10	23	33
16
17	7:45	20.8	2.6	16.2	2	4	2	2	24	22	46
18	9:38	20.5	2.5	2.0	2	1	1	1	21	11	32
19	11:21	20.2	2.4	347.9	1	1	1	2	11	12	23
20
21	9:25	19.6	2.1	322.6	1	1	1	1	11	11	22
22
23
24	7:43	18.6	1.8	284.0	1	1	2	5	11	25	36
25
26	8:28	17.9	1.5	257.2	1	0	2	23	10	43	53
27	8:50	17.5	1.4	243.8	0	0	3	8	0	38	38
28	10:42	17.1	1.3	229.6	1	1	3	30	11	60	71
29
30	9:14	16.4	1.0	204.1	2	12	2	16	32	36	68
Monthly mean					1.6	4.7	1.6	6.6	21.1	22.4	43.5
December 2021
Date	Time (JST)	P	B0	L0	North.		South.		Revised Wolf number
					g'	f	g'	f	North.	South.	Total
01	12:10	16.0	0.9	189.3	2	7	3	6	27	36	63
02	9:39	15.6	0.8	177.4	2	11	3	5	31	35	66
03
04	9:55	14.8	0.5	150.9	2	5	2	2	25	22	47
05	9:28	14.4	0.4	138.0	2	1	2	1	21	21	42
06
07
08
09	9:39	12.8	-0.1	85.2	0	0	2	0	0	20	20
10
11	11:34	11.9	-0.4	57.8	0	0	1	0	0	10	10
12
13	8:37	11.0	-0.7	33.1	0	0	2	2	0	22	22
14
15	7:57	10.2	-0.9	7.1	0	0	4	14	0	54	54
16	8:17	9.7	-1.0	353.7	0	0	5	37	0	87	87
17
18	10:26	8.7	-1.3	326.2	2	10	6	52	30	112	142
19	9:32	8.3	-1.4	313.5	2	4	9	53	24	143	167
20	10:01	7.8	-1.5	300.1	2	8	9	55	28	145	173
21
22	8:03	6.9	-1.8	274.8	3	4	9	35	34	125	159
23
24	13:08	5.9	-2.1	245.7	3	14	8	45	44	125	169
25	11:35	5.4	-2.2	233.4	3	18	8	42	48	122	170
26	10:55	4.9	-2.3	220.6	3	26	9	40	56	130	186
27
28	7:58	4.0	-2.5	195.8	4	23	7	24	63	94	157
29
30	10:27	3.0	-2.8	168.1	3	20	5	38	50	88	138
31	9:55	2.5	-2.9	155.2	1	2	4	15	12	55	67
Monthly mean					1.8	8.1	5.2	24.5	25.9	76.1	102.1

This individual observed result has no garantee of reliability by any public sector organizations.