The Sunspot Observer - Average annual indices of solar activity - Solar activity in 2011 - April, 2011

Statistics of sunspot activity

April, 2011

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		113		111	70									185	180	145										46	56	85	78	92	105.55	100
Wn		84		111	70									173	169	132										17	39	54	46	62	87.00	82.43
Ws		29		0	0									12	11	13										29	17	31	32	30	18.55	17.57
n		5		5	4									8	8	6										3	3	5	5	6	5.27	100
A		1		1	0									0	2	1										0	0	1	0	0	0.55	10.34
B		1		0	0									2	2	1										1	0	1	2	2	1.09	20.69
C		1		1	0									3	0	1										1	1	0	1	2	1.00	18.97
D		0		1	2									0	0	0										0	1	2	0	0	0.55	10.34
E		0		0	0									2	2	1										0	0	0	1	0	0.55	10.34
F		0		0	0									0	0	0										0	0	0	0	0	0.00	0.00
G		2		0	0									0	0	0										1	1	0	0	2	0.55	10.34
H		0		1	0									1	1	1										0	0	0	1	0	0.45	8.62
I		0		1	2									0	1	1										0	0	1	0	0	0.55	10.34
x		2		1	0									2	4	2										1	0	2	2	2	1.64	31.03
r		0		1	1									2	1	1										0	1	0	0	1	0.73	13.79
s		1		0	0									1	0	0										0	0	2	2	1	0.64	12.07
a		2		3	3									2	1	1										1	1	0	0	0	1.27	24.14
h		0		0	0									0	0	0										1	0	1	1	1	0.36	6.90
k		0		0	0									1	2	2										0	1	0	0	1	0.64	12.07
x		1		3	2									1	4	3										0	0	2	1	0	1.55	29.31
o		4		1	2									2	2	1										2	2	2	3	5	2.36	44.83
i		0		1	0									5	1	2										1	1	1	1	1	1.27	24.14
c		0		0	0									0	1	0										0	0	0	0	0	0.09	1.72
CV		58		42	49									104	119	100										61	71	91	84	121	81.82	100
CVn		29		42	49									102	118	98										9	27	41	41	78	57.64	70.44
CVs		29		0	0									2	1	2										52	44	50	43	43	24.18	29.56
gr		5		4	3									8	4	5										3	3	3	4	6	4.36	82.76
grfp		39		37	18									53	63	45										6	23	15	8	11	28.91	54.83
grf		24		23	11									52	33	39										9	13	18	19	21	23.82	45.17
efp		0		1	1									0	2	0										0	0	1	1	0	0.55	10.34
ef		0		0	0									0	2	1										0	0	1	0	0	0.36	6.90
Cond		3		2	3									2	1	3										3	2	1	1	2	2.09	58.18