The Sunspot Observer - Average annual indices of solar activity NGDC

Solar activity in 2015

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	96.73	67.12	62.22	81.56	91.61	79.46	74.17	59.82	74.94	56.77	61.09	50.95	71.37	71.37
Wn	32.21	41.68	23.83	46.37	43.73	49.55	38.96	21.86	33.99	27.36	52.09	22.18	36.01	36.15
Ws	64.52	25.43	38.38	35.18	47.88	29.91	35.21	37.96	40.95	29.42	9.00	28.76	35.37	35.22
n	5.80	3.92	4.02	5.14	5.69	4.23	4.94	3.21	4.38	3.68	3.62	3.25	4.33	4.32
A	0.79	0.86	0.90	0.77	1.06	0.62	0.87	0.70	0.61	0.66	0.82	0.54	0.77	0.77
B	0.62	0.64	0.64	0.83	1.02	0.47	0.52	0.38	0.69	0.38	0.62	0.24	0.59	0.59
C	0.77	0.86	0.91	1.41	1.17	0.79	0.69	0.46	1.01	0.52	0.73	0.58	0.82	0.83
D	1.19	0.60	0.48	1.09	0.48	0.83	0.74	0.41	0.70	0.58	0.70	0.46	0.69	0.69
E	0.30	0.13	0.27	0.21	0.16	0.55	0.14	0.28	0.36	0.25	0.06	0.27	0.25	0.25
F	0.28	0.21	0.04	0.04	0.31	0.16	0.03	0.15	0.06	0.10	0.21	0.08	0.14	0.14
G	0.43	0.15	0.02	0.02	0.04	0.15	0.25	0.05	0.26	0.10	0.12	0.26	0.16	0.16
H	0.02	0.02	0.02	0.11	0.01	0.01	0.05	0.02	0.16	0.01	0.01	0.11	0.05	0.05
I	1.41	0.45	0.73	0.66	1.45	0.65	1.65	0.75	0.52	1.09	0.36	0.71	0.88	0.87
x	1.41	1.50	1.55	1.59	2.08	1.09	1.39	1.09	1.30	1.03	1.44	0.77	1.36	1.35
r	0.41	0.21	0.28	0.41	0.43	0.20	0.22	0.35	0.43	0.37	0.41	0.40	0.35	0.34
s	1.47	0.97	0.69	1.26	1.61	0.94	1.94	0.57	0.74	0.90	0.59	0.65	1.03	1.03
a	1.77	1.10	0.90	1.35	1.26	1.43	1.09	0.66	1.30	0.96	1.01	0.88	1.14	1.14
h	0.05	0.00	0.04	0.12	0.00	0.03	0.02	0.03	0.19	0.01	0.00	0.14	0.05	0.05
k	0.68	0.15	0.58	0.41	0.31	0.53	0.28	0.50	0.42	0.41	0.17	0.40	0.41	0.40
x	2.22	1.34	1.66	1.54	2.52	1.28	2.56	1.47	1.30	1.76	1.19	1.36	1.69	1.68
o	2.47	1.80	1.58	2.70	2.49	1.78	1.83	1.01	2.10	1.30	1.76	1.40	1.85	1.85
i	0.56	0.44	0.41	0.49	0.20	0.54	0.37	0.25	0.56	0.34	0.39	0.19	0.40	0.39
c	0.56	0.35	0.38	0.42	0.49	0.62	0.18	0.48	0.43	0.28	0.29	0.29	0.40	0.40
CV	91.95	45.67	53.32	69.87	60.03	71.09	59.08	48.33	66.35	49.78	41.06	52.04	59.13	59.05
CVn	25.10	28.80	13.02	44.49	32.27	47.58	37.73	11.33	23.23	28.34	36.34	26.65	29.49	29.58
CVs	66.85	16.87	40.30	25.38	27.76	23.51	21.35	37.00	43.12	21.44	4.72	25.39	29.64	29.47