The Sunspot Observer - Average annual indices of solar activity - Solar activity in 2013 - April, 2013

Statistics of sunspot activity

April, 2013

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			101			123									106							67	72	68						126	94.71	100
Wn			56			74									43							56	59	56						43	55.29	58.37
Ws			45			49									63							11	13	12						83	39.43	41.63
n			7			9									7							3	4	4						7	5.86	100
A			1			2									0							0	0	1						2	0.86	14.63
B			1			2									1							0	1	0						1	0.86	14.63
C			1			1									3							0	1	0						0	0.86	14.63
D			2			1									2							1	0	0						2	1.14	19.51
E			0			0									0							1	1	0						2	0.57	9.76
F			0			0									0							0	0	1						0	0.14	2.44
G			0			0									0							0	0	0						0	0.00	0.00
H			1			1									0							0	0	0						0	0.29	4.88
I			1			2									1							1	1	2						0	1.14	19.51
x			2			4									1							0	1	1						3	1.71	29.27
r			1			1									1							0	0	0						0	0.43	7.32
s			2			2									3							1	2	0						1	1.57	26.83
a			1			1									2							1	0	2						2	1.29	21.95
h			0			0									0							0	0	0						0	0.00	0.00
k			1			1									0							1	1	1						1	0.86	14.63
x			3			5									1							1	1	3						2	2.29	39.02
o			3			3									5							1	2	0						0	2.00	34.15
i			1			1									1							0	0	0						3	0.86	14.63
c			0			0									0							1	1	1						2	0.71	12.20
CV			97			90									81							85	79	72						143	92.43	100
CVn			46			49									32							75	77	71						33	54.71	59.20
CVs			51			41									49							10	2	1						110	37.71	40.80
gr			5			6									7							2	3	3						5	4.43	75.61
grfp			12			10									15							21	20	17						35	18.57	53.50
grf			17			20									21							15	11	10						19	16.14	46.50
efp			1			2									0							1	1	1						0	0.86	14.63
ef			1			1									0							0	0	0						2	0.57	9.76
Cond			2			3									4							3	2	1						3	2.57	48.57