The Sunspot Observer - Average annual indices of solar activity - Solar activity in 2011 - September, 2011

Statistics of sunspot activity

September, 2011

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	Average	%
W		154	144		126		65		70	86				180		205			137		127				104		86			110	122.62	100
Wn		129	113		84		41		42	57				102		147			120		109				88		86			110	94.46	77.04
Ws		25	31		42		24		28	29				78		58			17		18				16		0			0	28.15	22.96
n		7	8		6		4		4	6				11		12			7		6				5		5			6	6.69	100
A		0	0		0		0		0	0				0		1			0		1				0		0			0	0.15	2.30
B		1	1		1		1		0	2				3		2			0		2				1		1			0	1.15	17.24
C		0	1		2		1		1	0				5		4			4		0				0		1			3	1.69	25.29
D		3	2		1		1		1	3				3		4			2		0				1		0			0	1.62	24.14
E		1	1		1		0		0	0				0		0			0		1				1		0			0	0.38	5.75
F		0	0		0		0		0	0				0		0			0		0				1		1			1	0.23	3.45
G		0	1		0		0		1	0				0		0			0		1				0		0			0	0.23	3.45
H		1	0		0		1		1	1				0		0			1		0				0		1			0	0.46	6.90
I		1	2		1		0		0	0				0		1			0		1				1		1			2	0.77	11.49
x		1	1		1		1		0	2				3		3			0		3				1		1			0	1.31	19.54
r		0	0		0		0		1	0				2		3			2		0				0		0			2	0.77	11.49
s		1	1		2		1		2	2				3		0			2		1				3		3			2	1.77	26.44
a		5	6		3		0		0	1				2		5			2		1				0		0			1	2.00	29.89
h		0	0		0		0		0	0				1		0			0		1				1		0			0	0.23	3.45
k		0	0		0		2		1	1				0		1			1		0				0		1			1	0.62	9.20
x		2	2		1		1		1	1				0		2			1		2				1		2			2	1.38	20.69
o		0	3		4		1		2	4				11		7			2		3				1		2			3	3.31	49.43
i		4	3		1		1		0	0				0		3			4		0				2		1			1	1.54	22.99
c		1	0		0		1		1	1				0		0			0		1				1		0			0	0.46	6.90
CV		118	117		76		106		96	113				145		146			107		97				129		81			86	109.00	100
CVn		87	87		43		94		81	84				89		114			101		95				101		81			86	87.92	80.66
CVs		31	30		33		12		15	29				56		32			6		2				28		0			0	21.08	19.34
gr		7	8		6		3		4	6				11		10			7		5				4		4			4	6.08	90.80
grfp		45	35		35		10		18	14				23		32			32		25				27		16			23	25.77	46.79
grf		39	29		31		14		12	12				47		51			35		41				26		19			25	29.31	53.21
efp		0	0		0		1		0	0				0		1			0		0				1		1			2	0.46	6.90
ef		0	0		0		0		0	0				0		1			0		1				0		0			0	0.15	2.30
Cond		2	3		4		3		2	3				4		3			3		2				3		2			3	2.85	43.08