The Sunspot Observer - Average annual indices of solar activity - Solar activity in 1991 - August, 1991

Statistics of sunspot activity

August, 1991

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		358	351		255	244		215	165				217			506	688		660	678						321						388.17	100
Wn		219	179		154	144		99	83				54			68	87		174	225						183						139.08	35.83
Ws		139	172		101	100		116	82				163			438	601		486	453						138						249.08	64.17
n		9	9		9	9		11	9				11			15	14		17	16						15						12.00	100
A		0	0		2	1		2	1				1			1	2		0	1						1						1.00	8.33
B		2	1		1	0		1	1				3			2	1		4	2						0						1.50	12.50
C		2	1		3	4		3	3				4			4	3		3	4						6						3.33	27.78
D		2	2		0	0		1	1				0			3	1		4	3						3						1.67	13.89
E		0	1		0	0		0	0				1			2	2		0	1						1						0.67	5.56
F		1	1		1	1		1	0				0			0	2		2	2						0						0.92	7.64
G		0	0		0	0		0	0				0			0	0		1	1						0						0.17	1.39
H		0	1		1	1		2	1				2			3	3		2	2						2						1.67	13.89
I		2	2		1	2		1	2				0			0	0		1	0						2						1.08	9.03
x		2	1		3	1		3	2				4			3	3		4	3						1						2.50	20.83
r		0	0		0	1		0	0				0			0	0		0	0						1						0.17	1.39
s		5	2		1	1		2	1				5			6	1		6	5						6						3.42	28.47
a		1	5		3	5		5	4				2			2	6		4	5						6						4.00	33.33
h		0	0		0	0		0	1				0			2	0		0	0						0						0.25	2.08
k		1	1		2	1		1	1				0			2	4		3	3						1						1.67	13.89
x		2	3		4	4		5	4				3			4	5		3	3						5						3.75	31.25
o		4	3		4	3		4	4				6			6	3		8	7						8						5.00	41.67
i		1	1		1	2		2	1				2			5	5		2	3						2						2.25	18.75
c		2	2		0	0		0	0				0			0	1		4	3						0						1.00	8.33
CV		162	170		123	103		126	137				92			303	286		342	330						199						197.75	100
CVn		82	73		58	64		88	79				16			60	85		121	121						118						80.42	40.67
CVs		80	97		65	39		38	58				76			243	201		221	209						81						117.33	59.33