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

Statistics of sunspot activity

February, 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	Average	%
W									62					52	54	24	25	34		99	122			170			176		81.80	100
Wn									46					41	42	13	25	23		28	40			73			69		40.00	48.90
Ws									16					11	12	11	0	11		71	82			97			107		41.80	51.10
n									5					4	4	2	2	3		6	6			10			10		5.20	100
A									1					1	2	1	1	1		0	0			1			0		0.80	15.38
B									3					1	0	0	0	0		0	0			0			1		0.50	9.62
C									0					2	1	1	1	0		2	0			3			1		1.10	21.15
D									0					0	1	0	0	0		2	2			2			2		0.90	17.31
E									0					0	0	0	0	0		1	1			2			0		0.40	7.69
F									0					0	0	0	0	0		0	1			0			0		0.10	1.92
G									0					0	0	0	0	0		0	0			0			1		0.10	1.92
H									1					0	0	0	0	1		0	0			0			2		0.40	7.69
I									0					0	0	0	0	1		1	2			2			3		0.90	17.31
x									4					2	2	1	1	1		0	0			1			1		1.30	25.00
r									0					0	0	0	0	0		1	0			2			0		0.30	5.77
s									0					1	0	0	0	1		2	2			4			3		1.30	25.00
a									0					0	1	0	0	0		2	3			1			4		1.10	21.15
h									1					1	1	1	1	1		0	0			0			1		0.70	13.46
k									0					0	0	0	0	0		1	1			2			1		0.50	9.62
x									2					1	2	1	1	3		1	2			3			5		2.10	40.38
o									2					2	1	1	1	0		3	0			3			3		1.60	30.77
i									1					1	1	0	0	0		2	4			4			2		1.50	28.85
c									0					0	0	0	0	0		0	0			0			0		0.00	0.00
CV									48					56	65	42	42	51		114	135			176			170		89.90	100
CVn									45					55	64	41	42	41		24	45			73			78		50.80	56.51
CVs									3					1	1	1	0	10		90	90			103			92		39.10	43.49