The Sunspot Observer - Average annual indices of solar activity - Solar activity in 2001 - September, 2001

Statistics of sunspot activity

September, 2001

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	97			165	205			310	289		221	276	233	262		133		147	219	236		294		284				228			224.94	100
Wn	61			78	87			93	64		43	65	41	67		47		105	122	139		163		161				123			91.19	40.54
Ws	36			87	118			217	225		178	211	192	195		86		42	97	97		131		123				105			133.75	59.46
n	5			8	9			10	10		7	10	8	8		6		9	10	11		10		12				11			9.00	100
A	0			0	0			0	1		0	2	0	0		0		0	0	0		0		0				0			0.19	2.08
B	0			0	0			0	0		0	0	1	0		0		0	0	0		0		0				0			0.06	0.69
C	0			0	0			2	1		2	1	1	0		1		2	0	0		0		0				0			0.63	6.94
D	2			3	2			3	3		2	3	2	3		3		3	5	3		5		5				4			3.19	35.42
E	1			1	1			2	4		1	2	2	2		0		0	1	1		1		1				1			1.31	14.58
F	0			1	2			2	1		1	1	1	2		2		1	0	1		1		1				1			1.13	12.50
G	1			0	1			1	0		0	0	0	0		0		1	2	2		0		1				0			0.56	6.25
H	1			2	1			0	0		0	1	1	0		0		2	1	2		3		3				4			1.31	14.58
I	0			1	2			0	0		1	0	0	1		0		0	1	2		0		1				1			0.63	6.94
x	0			0	0			0	1		0	2	1	0		0		0	0	0		0		0				0			0.25	2.78
r	0			0	1			2	2		0	0	0	2		2		4	2	1		0		1				1			1.13	12.50
s	2			5	3			2	3		2	2	2	2		3		1	3	3		3		2				5			2.69	29.86
a	0			0	2			2	2		2	3	3	3		0		3	4	5		4		6				3			2.63	29.17
h	0			1	1			1	1		0	1	0	0		0		0	0	0		0		0				0			0.31	3.47
k	3			2	2			3	1		3	2	2	1		1		1	1	2		3		3				2			2.00	22.22
x	1			3	3			0	1		1	3	1	1		0		2	2	4		3		4				5			2.13	23.61
o	2			3	3			5	3		2	3	3	0		2		6	5	3		1		4				2			2.94	32.64
i	2			2	1			4	5		3	3	3	6		4		1	2	1		4		2				3			2.88	31.94
c	0			0	2			1	1		1	1	1	1		0		0	1	3		2		2				1			1.06	11.81
CV	172			224	252			296	251		199	243	194	197		144		140	215	263		277		286				236			224.31	100
CVn	103			106	115			100	89		65	90	41	61		54		79	125	127		136		178				96			97.81	43.61
CVs	69			118	137			196	162		134	153	153	136		90		61	90	136		141		108				140			126.50	56.39
gr	4			5	5			10	8		7	8	7	7		6		8	9	9		8		10				8			7.44	82.64
grfp	31			51	76			145	131		95	106	94	113		44		34	86	83		123		113				76			87.56	65.65
grf	15			31	35			65	56		56	68	58	68		29		22	32	41		69		49				39			45.81	34.35
efp	1			3	4			0	2		0	1	1	1		0		1	1	2		2		2				3			1.50	16.67
ef	0			0	0			0	0		0	1	0	0		0		0	0	0		0		0				0			0.06	0.69
Cond	3			2	2			2	2		2	2	1	1		2		3	1	2		2		2				2			1.94	61.25