The Sunspot Observer - Average annual indices of solar activity

Solar activity in 1998

Visual indices of solar activity by author's observations

													Average by
month	I	II	III	IV	V	VI	VII	VIII	IX	X	XI	XII	days	months
N	3	14	20	19	19	21	25	19	16	7	7	2	14.33	14.33
W	35.00	26.00	49.55	35.53	72.00	87.57	98.88	121.37	137.06	41.43	79.29	114.00	77.83	74.81
Wn	17.00	4.36	8.45	5.95	32.11	35.67	41.00	78.32	67.94	24.57	47.57	56.50	34.72	34.95
Ws	18.00	21.64	41.10	29.58	39.89	51.43	57.88	43.05	69.13	16.86	31.71	57.50	43.05	39.81
n	2.67	1.86	2.90	2.37	3.11	5.10	5.84	6.63	6.69	2.14	4.57	6.50	4.31	4.20
A	0.67	0.14	0.10	0.16	0.32	0.38	0.56	0.63	0.31	0.00	0.14	0.00	0.32	0.28
B	0.67	0.07	0.00	0.21	0.21	0.43	0.72	0.68	0.50	0.29	0.14	0.00	0.36	0.33
C	1.00	0.07	0.40	0.74	0.32	1.24	1.44	0.89	1.31	0.43	0.86	1.00	0.83	0.81
D	0.33	0.43	0.65	0.63	0.63	1.62	1.24	0.95	1.94	0.86	1.14	1.50	1.02	0.99
E	0.00	0.29	0.55	0.05	0.68	0.10	0.24	0.37	0.63	0.14	0.43	0.00	0.34	0.29
F	0.00	0.00	0.45	0.16	0.26	0.00	0.00	0.32	0.31	0.14	0.29	0.50	0.19	0.20
G	0.00	0.14	0.10	0.26	0.05	0.05	0.00	0.21	0.25	0.14	0.00	1.00	0.13	0.18
H	0.00	0.14	0.10	0.11	0.53	1.24	1.12	1.79	0.81	0.00	0.86	2.00	0.74	0.72
I	0.00	0.57	0.55	0.05	0.11	0.05	0.52	0.79	0.63	0.14	0.71	0.50	0.40	0.39
x	1.33	0.21	0.10	0.37	0.53	0.81	1.28	1.32	0.81	0.29	0.29	0.00	0.68	0.61
r	0.00	0.36	0.60	0.26	0.32	0.86	0.68	0.79	0.56	0.00	0.29	0.50	0.52	0.44
s	0.00	0.50	0.70	0.79	0.63	1.00	1.24	1.89	1.69	0.43	1.00	2.00	1.03	0.99
a	1.00	0.43	0.70	0.74	0.95	1.76	2.04	1.53	2.88	1.29	2.00	4.00	1.45	1.61
h	0.33	0.21	0.20	0.05	0.05	0.48	0.36	0.16	0.06	0.00	0.00	0.00	0.19	0.16
k	0.00	0.14	0.60	0.16	0.63	0.19	0.24	0.95	0.69	0.14	1.00	0.00	0.44	0.40
x	0.67	0.86	0.75	0.32	0.95	1.67	2.20	3.21	1.75	0.14	1.71	2.50	1.45	1.39
o	1.33	0.57	0.90	1.37	0.58	2.33	2.04	1.95	2.63	1.14	0.57	2.50	1.53	1.49
i	0.67	0.43	0.85	0.63	1.05	1.05	1.52	0.68	1.63	0.57	1.71	1.00	1.01	0.98
c	0.00	0.00	0.40	0.05	0.53	0.05	0.08	0.79	0.69	0.29	0.57	0.50	0.32	0.33
CV	28.67	34.14	70.65	40.32	67.42	77.48	76.84	106.63	119.13	41.71	93.71	99.50	73.55	71.35
CVn	8.67	4.86	8.35	6.21	33.89	31.71	26.92	70.47	64.56	27.00	43.57	45.00	30.92	30.93
CVs	20.00	29.29	62.30	34.11	33.53	45.76	49.92	36.16	54.56	14.71	50.14	54.50	42.63	40.41