The Sunspot Observer - Average annual indices of solar activity NGDC

Solar activity in 2013

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	92.37	57.30	74.82	107.39	116.55	77.96	81.69	90.26	53.61	119.85	118.23	120.02	92.83	92.50
Wn	63.38	36.38	41.10	60.11	58.63	25.89	21.35	31.19	25.98	41.30	29.40	24.32	38.30	38.25
Ws	28.99	20.92	33.73	47.28	57.92	52.07	60.34	59.07	27.63	78.55	88.83	95.70	54.54	54.25
n	6.18	4.03	5.33	6.20	7.07	4.92	4.55	6.05	3.84	7.16	6.29	7.33	5.77	5.75
A	0.58	0.49	0.74	0.78	1.13	0.69	0.97	0.82	1.07	0.86	0.75	1.10	0.84	0.83
B	0.49	0.42	0.74	0.51	0.96	0.51	0.60	0.74	0.24	1.01	0.58	1.08	0.66	0.66
C	1.05	0.76	1.13	1.29	1.32	1.11	0.60	1.42	0.80	1.25	1.14	1.15	1.09	1.08
D	0.58	0.96	1.11	1.78	1.97	1.26	0.95	1.26	0.67	1.77	1.47	1.25	1.25	1.25
E	0.18	0.00	0.21	0.29	0.38	0.03	0.30	0.12	0.02	0.44	0.50	0.62	0.27	0.26
F	0.24	0.00	0.00	0.10	0.04	0.00	0.09	0.00	0.00	0.04	0.14	0.05	0.06	0.06
G	0.42	0.03	0.15	0.07	0.27	0.10	0.43	0.14	0.11	0.11	0.18	0.17	0.18	0.18
H	0.15	0.12	0.23	0.14	0.10	0.11	0.03	0.10	0.06	0.09	0.36	0.33	0.15	0.15
I	2.49	1.26	1.03	1.24	0.91	1.11	0.60	1.45	0.88	1.60	1.17	1.58	1.28	1.28
x	1.07	0.90	1.48	1.28	2.09	1.21	1.56	1.56	1.31	1.87	1.33	2.18	1.50	1.49
r	0.61	0.19	0.30	0.48	0.60	0.44	0.30	0.56	0.38	0.59	0.37	0.41	0.44	0.44
s	2.28	1.77	1.75	1.92	2.03	1.64	1.31	2.31	1.47	2.15	1.85	1.91	1.87	1.87
a	1.58	0.82	1.35	1.60	1.58	1.07	0.99	1.13	0.58	1.49	1.48	1.86	1.30	1.29
h	0.24	0.23	0.28	0.18	0.10	0.06	0.02	0.06	0.06	0.22	0.17	0.12	0.15	0.15
k	0.40	0.13	0.17	0.74	0.67	0.50	0.37	0.43	0.03	0.85	1.09	0.84	0.52	0.52
x	3.22	1.87	1.99	2.16	2.14	1.91	1.59	2.37	2.00	2.55	2.28	3.02	2.26	2.26
o	2.41	1.83	2.97	2.70	3.94	2.30	2.41	3.11	1.63	3.58	2.69	3.05	2.73	2.72
i	0.29	0.26	0.35	0.74	0.77	0.48	0.22	0.39	0.14	0.40	0.39	0.68	0.43	0.43
c	0.26	0.08	0.01	0.60	0.22	0.23	0.34	0.18	0.07	0.63	0.92	0.58	0.35	0.34
CV	83.85	53.65	69.18	105.04	103.38	68.69	65.23	76.83	38.02	112.81	117.59	107.58	83.75	83.49
CVn	58.81	39.24	40.66	55.06	51.96	17.96	18.10	21.12	18.94	32.32	34.25	22.37	34.22	34.23
CVs	25.05	14.41	28.52	49.98	51.42	50.73	47.12	55.70	19.08	80.48	83.34	85.21	49.53	49.25