The Sunspot Observer - Average annual indices of solar activity NGDC

Solar activity in 2000

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	29	31	30	31	30	31	31	30	31	30	31	30.50	30.50
W	129.86	148.33	195.47	176.33	168.16	174.56	214.37	160.07	142.27	131.56	142.49	134.35	159.89	159.82
Wn	55.62	58.84	76.98	77.73	83.05	111.99	115.71	86.87	77.07	54.86	83.89	83.00	80.51	80.47
Ws	74.24	89.49	118.49	98.60	85.10	62.57	98.66	73.20	65.20	76.70	58.60	51.35	79.38	79.35
n	7.84	9.40	10.33	10.22	8.53	9.72	11.32	10.11	6.90	7.71	8.25	8.06	9.04	9.03
A	0.75	0.93	0.94	1.01	1.10	0.70	0.72	1.04	0.75	0.72	0.72	1.14	0.87	0.88
B	1.16	1.39	1.09	0.98	1.45	0.82	0.70	0.84	0.82	0.61	0.42	0.70	0.92	0.92
C	2.07	1.86	1.80	2.05	1.91	1.84	1.73	2.48	1.29	1.63	1.64	1.43	1.81	1.81
D	1.79	2.25	2.93	2.34	1.66	2.30	2.22	2.41	1.42	2.95	1.74	1.94	2.17	2.16
E	0.22	0.28	0.89	0.43	0.54	0.25	0.55	0.41	0.73	0.24	0.26	0.37	0.44	0.43
F	0.05	0.10	0.10	0.03	0.20	0.48	0.77	0.02	0.34	0.05	0.34	0.04	0.21	0.21
G	0.59	0.66	1.02	1.35	0.80	0.92	1.02	0.44	0.49	0.48	0.88	0.58	0.77	0.77
H	0.02	0.07	0.07	0.03	0.15	0.23	0.08	0.00	0.00	0.05	0.04	0.01	0.06	0.06
I	1.19	1.86	1.49	1.99	0.74	2.20	3.53	2.48	1.06	0.96	2.22	1.86	1.80	1.80
x	1.91	2.32	2.03	1.99	2.55	1.52	1.42	1.88	1.57	1.33	1.14	1.83	1.79	1.79
r	0.47	0.68	0.70	0.64	0.56	0.79	0.56	0.84	0.43	0.44	0.35	0.41	0.57	0.57
s	2.88	3.56	3.32	3.81	2.16	3.42	4.69	4.35	1.97	3.15	3.24	3.11	3.30	3.31
a	2.36	2.23	2.87	2.87	1.59	2.41	3.56	2.98	2.18	2.54	2.98	2.38	2.58	2.58
h	0.02	0.19	0.13	0.05	0.33	0.36	0.11	0.00	0.00	0.09	0.11	0.03	0.12	0.12
k	0.19	0.42	1.28	0.85	1.34	1.22	0.98	0.07	0.75	0.16	0.44	0.31	0.67	0.67
x	1.96	2.85	2.50	3.03	1.98	3.12	4.33	3.52	1.81	1.74	2.98	3.01	2.73	2.74
o	5.44	5.98	6.11	6.36	5.23	5.59	5.18	5.89	3.71	4.95	4.53	4.33	5.27	5.27
i	0.32	0.41	1.09	0.55	0.67	0.74	0.92	0.63	0.88	0.91	0.56	0.70	0.70	0.70
c	0.12	0.16	0.64	0.29	0.65	0.27	0.89	0.08	0.50	0.11	0.19	0.03	0.33	0.33
CV	97.38	127.75	182.31	154.72	147.24	168.83	187.61	121.23	111.89	117.49	123.72	104.89	137.11	137.09
CVn	44.29	52.07	68.56	69.84	74.45	107.12	106.95	65.28	62.07	45.63	72.86	59.84	69.07	69.08
CVs	53.09	75.68	113.74	84.87	72.79	61.70	80.66	55.94	49.82	71.86	50.86	45.05	68.04	68.01