The Sunspot Observer - Average annual indices of solar activity - Solar activity in 1999 - April, 1999

Statistics of sunspot activity

April, 1999

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	47	48	29	109	116	141	103	99			121			66	70				45				46								80.00	100
Wn	22	22	11	40	43	56	56	57			60			0	0				18				17								30.92	38.65
Ws	25	26	18	69	73	85	47	42			61			66	70				27				29								49.08	61.35
n	4	4	2	5	5	6	5	5			5			4	3				3				3								4.15	100
A	1	1	0	1	0	0	0	0			0			0	0				0				0								0.23	5.56
B	0	0	0	0	0	0	0	0			1			0	0				0				0								0.08	1.85
C	0	1	0	1	0	1	0	0			0			1	0				3				1								0.62	14.81
D	0	0	1	3	3	3	3	3			3			1	1				0				0								1.62	38.89
E	0	0	0	0	2	1	0	0			1			1	0				0				1								0.46	11.11
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	1	1			0			0	2				0				0								0.31	7.41
H	2	1	0	0	0	0	0	0			0			0	0				0				1								0.31	7.41
I	1	1	1	0	0	1	1	1			0			1	0				0				0								0.54	12.96
x	1	1	0	1	0	0	0	0			1			0	0				0				0								0.31	7.41
r	0	0	0	0	0	0	0	0			0			0	1				0				0								0.08	1.85
s	2	3	2	1	1	2	3	3			0			2	0				2				1								1.69	40.74
a	1	0	0	3	4	4	1	1			4			2	2				1				2								1.92	46.30
h	0	0	0	0	0	0	0	0			0			0	0				0				0								0.00	0.00
k	0	0	0	0	0	0	1	1			0			0	0				0				0								0.15	3.70
x	4	3	1	1	0	1	1	1			0			1	0				0				1								1.08	25.93
o	0	1	0	2	1	2	2	2			3			1	2				2				1								1.46	35.19
i	0	0	1	2	4	3	0	0			2			2	1				1				1								1.31	31.48
c	0	0	0	0	0	0	2	2			0			0	0				0				0								0.31	7.41
CV	28	32	38	78	115	110	147	147			85			66	56				31				41								74.92	100
CVn	20	20	10	33	51	50	86	86			25			0	0				12				8								30.85	41.17
CVs	8	12	28	45	64	60	61	61			60			66	56				19				33								44.08	58.83
gr	1	1	1	4	5	6	4	4			5			4	3				3				2								3.31	82.69
grfp	5	6	5	39	45	59	42	39			53			12	20				8				8								26.23	69.45
grf	0	0	3	19	21	22	10	9			18			14	20				7				7								11.54	30.55
efp	2	2	1	0	0	0	1	1			0			0	0				0				1								0.62	15.38
ef	0	0	0	1	0	0	0	0			0			0	0				0				0								0.08	1.92
Cond	2-3	3-4	2	1-2	3	2	4-5	4			2			1	2				2				2								2.46	50.80