The Sunspot Observer - Average annual indices of solar activity - Solar activity in 1990 - July, 1990

Statistics of sunspot activity

July, 1990

Visual indices of solar activity by author's observations

Date	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	Average	%
W		317		316	240	205			96	89	104	107	86		109	85	71		54			169										146.29	100
Wn		130		151	108	84			58	61	76	70	55		68	60	37		28			90										76.86	52.54
Ws		187		165	132	121			38	28	28	37	31		41	25	34		26			79										69.43	47.46
n		12		11	12	9			7	6	7	6	5		7	6	6		3			10										7.64	100
A		1		1	2	0			2	1	1	0	0		1	1	2		0			2										1.00	13.08
B		1		0	2	0			1	1	2	1	0		0	0	0		0			3										0.79	10.28
C		1		3	2	3			0	1	0	3	3		2	2	0		1			0										1.50	19.63
D		4		3	3	3			1	1	1	0	1		2	1	1		0			0										1.50	19.63
E		3		2	1	1			0	0	1	0	0		0	0	1		1			0										0.71	9.35
F		0		0	0	0			0	0	0	0	0		0	0	0		0			1										0.07	0.94
G		1		2	1	0			1	0	0	0	0		0	0	0		1			1										0.50	6.54
H		0		0	0	1			1	1	2	0	0		0	0	1		0			1										0.50	6.54
I		1		0	1	1			1	1	0	2	1		2	2	1		0			2										1.07	14.02
x		2		1	4	0			3	2	3	1	0		1	1	2		0			5										1.79	23.36
r		0		1	0	1			0	0	0	0	0		2	0	0		0			0										0.29	3.74
s		3		0	3	3			3	2	2	3	1		4	1	2		1			3										2.21	28.97
a		5		7	3	3			1	2	2	2	4		0	4	2		0			0										2.50	32.71
h		0		0	0	0			0	0	0	0	0		0	0	0		1			1										0.14	1.87
k		2		2	2	2			0	0	0	0	0		0	0	0		1			1										0.71	9.35
x		2		1	3	2			4	3	3	2	1		3	3	4		0			5										2.57	33.64
o		5		5	7	5			2	3	3	2	1		3	3	1		2			4										3.29	42.99
i		5		4	2	2			1	0	1	2	3		1	0	1		1			1										1.71	22.43
c		0		1	0	0			0	0	0	0	0		0	0	0		0			0										0.07	0.94
CV		250		232	193	176			72	50	70	51	58		84	56	67		108			137										114.57	100
CVn		128		129	111	105			60	42	61	37	42		59	48	42		61			64										70.64	61.66
CVs		122		103	82	71			12	8	9	14	16		25	8	25		47			73										43.93	38.34