The Sunspot Observer - Average annual indices of solar activity - Solar activity in 2025 - September, 2025

Statistics of sunspot activity

September, 2025

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					188		87	93		115		66	82			149		119	131	139	176	156	228					151	198		138.53	100
Wn					105		58	60		81		39	30			82		50	60	63	67	50	62					86	132		68.33	49.33
Ws					83		29	33		34		27	52			67		69	71	76	109	106	166					65	66		70.20	50.67
n					12		6	6		8		5	6			9		6	7	7	11	10	15					10	10		8.53	100
A					2		1	0		0		0	1			1		0	0	0	0	1	2					0	0		0.53	6.25
B					2		0	0		2		2	1			2		0	0	0	2	0	2					3	2		1.20	14.06
C					1		1	2		2		0	1			2		1	3	2	4	3	2					4	3		2.07	24.22
D					1		2	2		2		2	2			3		3	3	4	2	3	4					2	3		2.53	29.69
E					0		0	0		0		0	0			0		0	0	0	1	1	1					0	1		0.27	3.13
F					1		0	0		0		0	0			0		0	0	0	0	0	0					0	0		0.07	0.78
G					1		0	0		0		0	0			1		1	1	1	0	0	0					0	0		0.33	3.91
H					3		1	1		1		1	1			0		1	0	0	1	1	2					1	1		1.00	11.72
I					1		1	1		1		0	0			0		0	0	0	1	1	2					0	0		0.53	6.25
x					4		1	0		2		2	2			3		0	0	0	2	1	4					3	2		1.73	20.31
r					0		0	1		1		0	1			2		0	1	1	0	0	1					0	1		0.60	7.03
s					5		3	3		3		2	3			1		2	3	3	4	6	5					4	4		3.40	39.84
a					1		1	2		2		1	0			3		4	3	3	5	1	4					3	3		2.40	28.13
h					1		0	0		0		0	0			0		0	0	0	0	0	0					0	0		0.07	0.78
k					1		1	0		0		0	0			0		0	0	0	0	2	1					0	0		0.33	3.91
x					6		3	2		2		1	2			1		1	0	0	2	3	6					1	1		2.07	24.22
o					4		2	1		5		4	3			6		2	6	5	7	4	6					7	6		4.53	53.13
i					2		1	3		1		0	0			2		2	1	2	2	3	3					2	3		1.80	21.09
c					0		0	0		0		0	1			0		1	0	0	0	0	0					0	0		0.13	1.56
CV					177		97	81		78		58	77			104		119	116	130	124	206	201					102	136		120.40	100
CVn					93		68	49		46		29	39			72		46	60	60	53	39	39					69	94		57.07	47.40
CVs					84		29	32		32		29	38			32		73	56	70	71	167	162					33	42		63.33	52.60
gr					7		3	4		6		4	4			9		5	7	7	10	8	11					9	9		6.87	80.47
grfp					21		11	12		12		8	11			17		25	25	25	24	22	27					15	31		19.07	37.00
grf					42		13	19		21		7	9			42		33	36	44	41	32	47					35	66		32.47	63.00
efp					3		2	2		2		1	1			0		1	0	0	1	2	3					1	1		1.33	15.63
ef					2		1	0		0		0	1			0		0	0	0	0	0	1					0	0		0.33	3.91
Cond					3		3	2		3		4	3			3		3	1	2	3	4	3					3	2		2.80	44.00