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

Statistics of sunspot activity

May, 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	134	104	133	123			216		226						179	169	164	161	160		89		151	149			247	282	327	281		183.06	100
Wn	26	33	32	32			103		127						94	93	85	68	44		33		82	98			148	133	153	109		82.94	45.31
Ws	108	71	101	91			113		99						85	76	79	93	116		56		69	51			99	149	174	172		100.11	54.69
n	7	5	7	5			7		8						10	10	11	11	10		4		8	7			9	11	10	10		8.33	100
A	2	0	0	0			0		1						3	3	2	3	1		1		1	1			0	2	0	2		1.22	14.67
B	0	0	2	0			1		2						1	1	1	3	6		0		3	2			5	3	5	3		2.11	25.33
C	4	1	0	2			0		0						2	3	2	0	0		1		2	2			1	1	1	1		1.28	15.33
D	0	2	0	0			2		3						1	2	1	1	0		0		1	0			0	3	1	2		1.06	12.67
E	1	0	1	1			1		1						1	0	0	1	1		1		0	1			0	1	1	1		0.72	8.67
F	0	0	0	0			0		0						0	0	0	0	0		0		0	0			1	0	1	0		0.11	1.33
G	0	0	1	0			0		0						0	0	0	0	0		0		1	1			0	0	0	0		0.17	2.00
H	0	1	2	1			3		1						1	1	4	2	2		1		0	0			2	1	1	1		1.33	16.00
I	0	1	1	1			0		0						1	0	1	1	0		0		0	0			0	0	0	0		0.33	4.00
x	2	0	2	0			1		3						4	4	3	6	7		1		4	3			5	5	5	5		3.33	40.00
r	0	1	1	1			0		0						0	0	1	1	0		0		0	0			0	0	0	0		0.28	3.33
s	3	2	2	2			4		3						4	4	3	3	3		2		2	3			2	2	1	2		2.61	31.33
a	1	2	2	2			0		0						0	1	0	0	0		0		1	0			0	2	2	1		0.78	9.33
h	0	0	0	0			0		0						0	0	1	0	0		0		0	1			0	0	0	0		0.11	1.33
k	1	0	0	0			2		2						2	1	3	1	0		1		1	0			2	2	2	2		1.22	14.67
x	2	2	3	2			3		2						5	4	7	6	3		2		1	1			2	3	1	3		2.89	34.67
o	3	1	3	0			2		3						4	5	2	3	6		0		7	5			5	4	5	4		3.44	41.33
i	2	2	1	2			0		1						0	0	1	1	1		2		0	0			1	3	1	2		1.11	13.33
c	0	0	0	1			2		2						1	1	1	1	0		0		0	1			1	1	3	1		0.89	10.67
CV	100	69	71	67			168		179						155	125	210	117	62		70		92	113			126	178	173	153		123.78	100
CVn	39	22	23	12			92		112						79	80	113	70	14		12		59	73			62	59	63	59		57.94	46.81
CVs	61	47	48	55			76		67						76	45	97	47	48		58		33	40			64	119	110	94		65.83	53.19