The Sunspot Observer - Average annual indices of solar activity NGDC

Solar activity in 1988

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	61.60	41.80	83.72	96.30	72.66	118.27	123.80	127.89	134.70	135.74	139.85	208.45	112.33	112.06
Wn	18.35	30.10	43.32	51.65	23.49	55.68	62.03	88.95	74.38	79.00	95.01	120.82	61.99	61.90
Ws	43.24	11.71	40.40	44.65	49.17	62.59	61.77	38.93	60.32	56.74	44.84	87.63	50.34	50.17
n	3.75	3.05	4.16	5.25	4.18	6.06	5.76	6.58	7.99	7.60	8.05	10.41	6.09	6.07
A	0.57	0.74	0.58	0.68	0.83	0.66	0.79	0.84	1.44	0.97	1.06	0.91	0.84	0.84
B	0.84	0.50	0.56	0.53	0.90	0.75	0.93	0.78	1.91	1.15	1.11	1.10	0.92	0.92
C	0.85	0.67	0.77	0.99	0.77	1.16	0.73	1.13	1.59	1.34	1.81	2.12	1.16	1.16
D	0.55	0.35	1.32	0.97	0.51	0.99	1.06	1.71	1.40	0.95	1.07	2.64	1.13	1.13
E	0.27	0.00	0.31	0.16	0.21	0.60	0.64	0.34	0.41	0.31	0.46	1.02	0.40	0.39
F	0.03	0.00	0.13	0.34	0.15	0.25	0.32	0.23	0.05	0.30	0.35	0.28	0.21	0.20
G	0.24	0.25	0.12	0.51	0.05	0.32	0.38	0.52	0.32	0.50	0.53	1.05	0.40	0.40
H	0.03	0.11	0.08	0.04	0.05	0.29	0.13	0.15	0.08	0.12	0.10	0.06	0.11	0.10
I	0.38	0.44	0.30	1.04	0.70	1.03	0.77	0.88	0.80	1.97	1.56	1.23	0.93	0.93
x	1.40	1.23	1.14	1.21	1.74	1.41	1.72	1.62	3.36	2.12	2.17	2.02	1.76	1.76
r	0.32	0.19	0.35	0.29	0.43	0.26	0.33	0.28	0.64	0.42	0.58	0.68	0.40	0.40
s	1.03	0.90	1.04	2.03	1.11	1.69	1.59	1.85	1.78	2.35	2.77	3.11	1.77	1.77
a	0.61	0.29	1.12	1.23	0.58	1.54	0.71	1.36	1.51	1.32	1.39	2.89	1.22	1.21
h	0.14	0.30	0.14	0.17	0.09	0.63	0.39	0.42	0.15	0.19	0.34	0.36	0.28	0.28
k	0.24	0.13	0.37	0.32	0.24	0.54	1.01	1.05	0.55	1.21	0.80	1.35	0.66	0.65
x	0.97	1.29	0.96	1.76	1.59	1.99	1.69	1.87	2.32	3.06	2.71	2.20	1.87	1.87
o	2.17	1.68	2.08	2.44	2.04	2.73	2.58	3.43	4.80	3.59	4.14	5.92	3.13	3.13
i	0.61	0.09	1.06	1.05	0.39	1.02	1.19	1.22	0.83	0.87	1.13	2.10	0.97	0.96
c	0.00	0.00	0.07	0.01	0.17	0.32	0.30	0.06	0.04	0.08	0.07	0.19	0.11	0.11
CV	48.50	38.21	67.58	79.17	46.80	108.74	111.35	123.10	92.77	116.55	119.25	189.62	95.39	95.14
CVn	10.75	34.28	30.78	46.31	13.37	51.91	57.42	75.38	40.68	60.55	70.51	117.44	50.86	50.78
CVs	37.76	3.93	36.80	32.85	33.43	56.83	53.93	47.72	52.09	56.00	48.73	72.17	44.54	44.35