The Sunspot Observer - Average annual indices of solar activity - Solar activity in 2012 - April, 2012

Statistics of sunspot activity

April, 2012

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			76				39			25				87	128			157	162	194	152	147	125	167		134					122.54	100
Wn			47				39			12				59	79			61	48	66	44	59	38	43		52					49.77	40.62
Ws			29				0			13				28	49			96	114	128	108	88	87	124		82					72.77	59.38
n			4				2			2				5	7			7	6	7	6	7	5	6		7					5.46	100
A			0				0			0				2	3			0	0	0	0	1	0	0		0					0.46	8.45
B			1				1			1				0	0			2	1	1	1	1	0	1		2					0.92	16.90
C			0				0			1				0	1			2	2	1	1	1	1	1		2					1.00	18.31
D			1				1			0				2	1			1	3	5	3	4	3	3		1					2.15	39.44
E			1				0			0				1	2			1	0	0	1	0	1	1		2					0.77	14.08
F			0				0			0				0	0			0	0	0	0	0	0	0		0					0.00	0.00
G			0				0			0				0	0			0	0	0	0	0	0	0		0					0.00	0.00
H			1				0			0				0	0			0	0	0	0	0	0	0		0					0.08	1.41
I			0				0			0				0	0			1	0	0	0	0	0	0		0					0.08	1.41
x			1				1			1				2	3			2	1	1	1	2	0	1		2					1.38	25.35
r			1				0			1				0	1			2	1	1	0	0	0	0		0					0.54	9.86
s			2				1			0				0	0			2	2	1	2	1	2	1		1					1.15	21.13
a			0				0			0				3	3			1	2	2	1	3	1	2		4					1.69	30.99
h			0				0			0				0	0			0	0	0	1	1	1	1		0					0.31	5.63
k			0				0			0				0	0			0	0	2	1	0	1	1		0					0.38	7.04
x			1				0			0				2	3			1	0	0	0	1	0	0		0					0.62	11.27
o			2				2			2				1	2			3	3	3	4	2	3	4		3					2.62	47.89
i			1				0			0				2	2			3	2	3	1	4	2	2		3					1.92	35.21
c			0				0			0				0	0			0	1	1	1	0	0	0		1					0.31	5.63
CV			54				27			7				66	73			76	97	174	165	131	154	150		103					98.23	100
CVn			42				27			2				42	48			40	33	65	48	29	36	30		43					37.31	37.98
CVs			12				0			5				24	25			36	64	109	117	102	118	120		60					60.92	62.02
gr			4				2			2				3	6			7	6	7	6	6	5	6		7					5.15	94.37
grfp			12				4			1				16	23			45	56	66	61	39	46	51		28					34.46	50.97
grf			24				15			4				19	34			42	46	58	31	37	29	56		36					33.15	49.03
efp			0				0			0				0	0			0	0	0	0	0	0	0		0					0.00	0.00
ef			0				0			0				2	1			0	0	0	0	1	0	0		0					0.31	5.63
Cond			3				2			4				3	2			3	2	2	1	2	1	3		3					2.38	52.31