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

Statistics of sunspot activity

June, 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	Average	%
W			90	96								85				93				60			55				163			270	114.00	100
Wn			42	39								62				43				21			11				57			130	50.63	44.41
Ws			48	57								23				50				39			44				106			140	63.37	55.59
n			6	7								5				5				4			4				9			12	6.50	100
A			0	1								1				0				0			0				0			1	0.38	5.77
B			0	1								1				0				1			0				3			1	0.88	13.46
C			2	3								0				2				1			0				2			2	1.50	23.08
D			4	2								1				1				1			1				1			2	1.62	25.00
E			0	0								0				0				0			0				0			4	0.50	7.69
F			0	0								0				0				0			0				1			0	0.12	1.92
G			0	0								1				1				0			0				1			1	0.50	7.69
H			0	0								1				1				1			3				1			0	0.88	13.46
I			0	0								0				0				0			0				0			1	0.12	1.92
x			0	2								2				0				1			0				3			2	1.25	19.23
r			0	0								0				0				1			0				1			0	0.25	3.85
s			6	2								0				2				1			2				2			5	2.50	38.46
a			0	3								1				2				1			2				2			3	1.75	26.92
h			0	0								0				0				0			0				0			0	0.00	0.00
k			0	0								2				1				0			0				1			2	0.75	11.54
x			0	1								2				1				1			3				1			2	1.38	21.15
o			6	4								2				4				3			1				6			5	3.88	59.62
i			0	1								1				0				0			0				2			4	1.00	15.38
c			0	1								0				0				0			0				0			1	0.25	3.85
CV			122	84								106				98				36			46				120			258	108.75	100
CVn			61	44								68				30				19			10				29			127	48.50	44.60
CVs			61	40								38				68				17			36				91			131	60.25	55.40