The Sunspot Observer - Average annual indices of solar activity - Solar activity in 1990 - May, 1990

Statistics of sunspot activity

May, 1990

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		47	59		70		122		97	110	125	120		126			110	151	188			220	221		134			119			115	125.53	100
Wn		36	36		31		55		38	60	65	89		91			48	45	58			92	87		85			58			72	61.53	49.02
Ws		11	23		39		67		59	50	60	31		35			62	106	130			128	134		49			61			43	64.00	50.98
n		4	5		5		7		6	7	8	7		6			3	5	7			7	7		9			8			8	6.41	100
A		0	1		0		0		0	1	0	0		0			0	1	2			0	0		2			1			2	0.59	9.17
B		0	0		2		1		1	2	3	2		1			0	0	1			1	0		3			4			0	1.24	19.27
C		1	2		0		2		2	0	2	2		1			0	1	0			0	3		2			1			4	1.35	21.10
D		0	0		0		1		2	1	0	0		0			0	1	3			1	1		2			1			0	0.76	11.93
E		0	0		0		1		0	1	1	1		2			2	1	1			3	0		0			0			0	0.76	11.93
F		0	0		0		0		1	0	0	0		0			0	1	0			1	1		0			0			0	0.24	3.67
G		0	0		1		0		0	0	0	1		1			1	0	0			0	2		0			0			1	0.41	6.42
H		0	0		1		1		0	1	1	1		0			0	0	0			1	0		0			1			0	0.41	6.42
I		3	2		1		1		0	1	1	0		1			0	0	0			0	0		0			0			1	0.65	10.09
x		0	1		2		1		1	3	3	2		1			0	1	3			1	0		5			5			2	1.82	28.44
r		0	0		0		0		1	1	2	2		0			0	0	0			0	0		0			0			1	0.41	6.42
s		4	4		1		3		3	2	2	2		2			1	2	1			1	2		0			1			5	2.12	33.03
a		0	0		1		3		1	1	1	1		2			0	0	1			2	2		3			2			0	1.18	18.35
h		0	0		0		0		0	0	0	0		0			0	0	0			0	0		0			0			0	0.00	0.00
k		0	0		1		0		0	0	0	0		1			2	2	2			3	3		1			0			0	0.88	13.76
x		3	3		2		2		0	3	2	1		1			0	1	2			1	0		2			2			3	1.65	25.69
o		1	2		2		4		4	1	4	3		2			1	2	1			1	6		6			5			4	2.88	44.95
i		0	0		1		1		2	3	2	3		3			1	1	2			5	1		1			1			1	1.65	25.69
c		0	0		0		0		0	0	0	0		0			1	1	2			0	0		0			0			0	0.24	3.67
CV		41	43		66		83		95	71	60	75		117			129	141	163			199	186		95			47			77	99.29	100
CVn		31	22		54		35		32	36	38	67		94			73	58	102			82	75		34			31			51	53.82	54.21
CVs		10	21		12		48		63	35	22	8		23			56	83	61			117	111		61			16			26	45.47	45.79