The Sunspot Observer - Average annual indices of solar activity NGDC

Solar activity in 1999

Visual indices of solar activity by National Geophysical Data Center

													Average by
month	I	II	III	IV	V	VI	VII	VIII	IX	X	XI	XII	days	months
N	31	28	31	27	30	30	28	30	30	25	30	31	29.25	29.25
W	85.50	84.45	92.90	89.28	114.52	189.93	153.89	141.70	99.08	152.65	187.14	113.40	125.12	125.37
Wn	52.47	50.29	52.42	43.75	65.30	115.04	78.79	64.27	68.62	88.69	104.44	61.57	70.38	70.47
Ws	33.03	34.16	40.48	45.53	49.22	74.89	75.10	77.43	30.46	63.96	82.71	51.83	54.75	54.90
n	4.76	5.01	5.29	5.19	7.06	10.18	8.17	6.78	5.93	7.93	8.73	6.41	6.78	6.79
A	0.95	0.64	0.69	0.69	0.62	1.08	0.85	0.74	0.70	0.87	0.72	0.77	0.77	0.78
B	1.01	0.62	0.87	0.81	1.07	1.39	0.87	1.15	0.75	0.97	0.88	0.94	0.95	0.94
C	0.62	1.10	1.12	1.10	1.68	2.19	1.49	1.45	1.24	1.52	1.89	1.15	1.38	1.38
D	0.55	1.02	0.86	1.49	1.46	2.46	1.35	0.99	0.91	1.00	1.62	1.09	1.24	1.23
E	0.41	0.24	0.18	0.14	0.12	0.44	0.24	0.15	0.25	0.60	0.94	0.24	0.33	0.33
F	0.25	0.02	0.13	0.03	0.07	0.39	0.56	0.86	0.00	0.33	0.41	0.39	0.29	0.29
G	0.26	0.48	0.53	0.28	0.79	0.51	1.13	0.50	0.54	1.13	1.04	0.65	0.64	0.65
H	0.00	0.07	0.05	0.00	0.24	0.15	0.06	0.18	0.00	0.02	0.00	0.19	0.08	0.08
I	0.70	0.82	0.87	0.64	1.02	1.58	1.62	0.77	1.54	1.50	1.24	1.01	1.10	1.11
x	1.96	1.26	1.56	1.50	1.69	2.47	1.72	1.90	1.45	1.83	1.60	1.71	1.73	1.72
r	0.29	0.22	0.31	0.22	0.45	0.58	0.45	0.41	0.41	0.52	0.24	0.45	0.38	0.38
s	1.22	1.83	1.98	1.66	2.22	2.83	2.36	1.76	2.82	2.44	3.27	1.39	2.15	2.15
a	1.06	1.06	1.22	1.73	1.82	3.50	2.90	1.61	1.16	2.18	2.59	1.41	1.85	1.85
h	0.02	0.14	0.06	0.02	0.24	0.08	0.11	0.24	0.01	0.11	0.02	0.50	0.13	0.13
k	0.21	0.51	0.16	0.06	0.64	0.71	0.64	0.88	0.08	0.85	1.01	0.96	0.56	0.56
x	1.65	1.53	1.60	1.34	1.88	2.81	2.53	1.69	2.24	2.39	1.95	1.96	1.97	1.97
o	2.40	3.14	3.31	3.49	4.81	5.91	4.70	3.94	3.19	4.56	5.12	3.61	4.00	4.01
i	0.40	0.29	0.27	0.34	0.31	1.07	0.61	0.79	0.48	0.69	0.77	0.50	0.54	0.54
c	0.30	0.06	0.11	0.02	0.05	0.40	0.32	0.35	0.03	0.30	0.89	0.35	0.27	0.27
CV	56.20	75.96	65.65	62.90	106.32	145.46	123.62	113.14	69.21	123.36	155.29	115.63	100.90	101.06
CVn	37.31	38.28	38.02	30.17	70.44	88.58	64.18	48.49	49.88	71.03	79.33	67.29	56.93	56.92
CVs	18.89	37.68	27.63	32.73	35.88	56.89	59.44	64.64	19.33	52.33	75.96	48.34	43.97	44.15