The Sunspot Observer - Average annual indices of solar activity NGDC

Solar activity in 2002

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	30	31	30	31	31	30	31	30	31	30.42	30.42
W	175.26	181.35	144.86	185.00	188.33	132.39	168.52	179.17	182.16	142.20	144.88	134.23	163.07	163.20
Wn	76.66	72.58	56.91	102.82	90.75	48.97	56.12	64.77	75.20	82.62	54.80	59.58	70.12	70.15
Ws	98.60	108.77	87.96	82.18	97.58	83.42	112.40	114.40	106.97	59.59	90.09	74.66	92.95	93.05
n	10.13	9.72	8.29	9.91	10.98	8.43	7.52	8.73	9.51	7.99	7.54	7.23	8.82	8.83
A	0.60	0.94	0.83	0.64	0.70	1.07	0.61	0.41	0.60	0.52	0.48	0.53	0.66	0.66
B	0.55	0.55	0.33	0.67	0.70	0.63	0.57	0.39	0.51	0.41	0.45	0.38	0.51	0.51
C	2.07	1.99	1.74	1.90	2.12	1.76	1.24	1.17	1.71	1.36	1.03	1.54	1.63	1.64
D	3.07	2.80	2.44	3.29	2.79	2.49	2.21	3.08	3.44	2.26	1.89	2.14	2.65	2.66
E	0.59	0.57	0.79	0.87	0.89	0.27	0.65	0.81	0.32	0.40	0.36	0.37	0.58	0.57
F	0.35	0.62	0.21	0.22	0.12	0.05	0.70	0.26	0.36	0.35	0.69	0.23	0.34	0.35
G	0.48	0.40	0.66	0.69	0.57	0.17	0.22	0.85	0.44	0.32	0.55	0.72	0.51	0.51
H	0.13	0.04	0.05	0.06	0.27	0.31	0.05	0.10	0.08	0.05	0.34	0.00	0.12	0.12
I	2.28	1.80	1.25	1.58	2.83	1.68	1.28	1.64	2.04	2.31	1.76	1.33	1.82	1.82
x	1.15	1.49	1.16	1.31	1.41	1.70	1.17	0.81	1.12	0.93	0.93	0.91	1.17	1.17
r	0.25	0.43	0.32	0.44	0.37	0.55	0.62	0.46	0.29	0.35	0.21	0.21	0.38	0.38
s	4.52	3.77	3.41	3.57	4.36	3.45	2.18	2.90	3.62	3.33	3.07	2.63	3.40	3.40
a	3.05	3.20	2.95	3.44	3.31	1.55	2.05	3.30	3.43	2.32	1.66	2.96	2.77	2.77
h	0.15	0.05	0.01	0.14	0.31	0.28	0.04	0.18	0.05	0.17	0.33	0.08	0.15	0.15
k	1.01	0.77	0.44	1.02	1.22	0.90	1.47	1.10	0.99	0.88	1.34	0.43	0.96	0.96
x	3.01	2.78	2.13	2.27	3.80	3.07	1.93	2.16	2.73	2.89	2.58	1.86	2.60	2.60
o	5.91	5.36	4.93	5.89	5.80	4.69	3.82	5.03	5.24	3.86	3.62	4.36	4.87	4.88
i	0.94	1.28	1.14	1.41	1.00	0.53	0.94	1.06	1.21	0.95	0.93	0.87	1.02	1.02
c	0.26	0.30	0.09	0.34	0.38	0.14	0.83	0.48	0.33	0.29	0.41	0.14	0.33	0.33
CV	175.70	158.25	133.86	177.84	189.01	135.43	151.18	173.02	165.81	138.73	155.42	116.69	155.86	155.91
CVn	73.26	62.87	48.90	107.92	79.26	40.57	47.11	54.25	63.97	85.42	60.47	49.50	64.43	64.46
CVs	102.44	95.38	84.95	69.92	109.75	94.86	104.06	118.77	101.84	53.31	94.94	67.18	91.44	91.45