The Sunspot Observer - Average annual indices of solar activity - Solar activity in 1998 - December, 1998

Statistics of sunspot activity

December, 1998

Visual indices of solar activity by author's observations

Date01020304050607080910111213141516171819202122232425262728293031Average%
W   91       137                   114.00100
Wn   79       34                   56.5049.56
Ws   12       103                   57.5050.44
n   6       7                   6.50100
A   0       0                   0.000.00
B   0       0                   0.000.00
C   2       0                   1.0015.38
D   0       3                   1.5023.08
E   0       0                   0.000.00
F   0       1                   0.507.69
G   2       0                   1.0015.38
H   2       2                   2.0030.77
I   0       1                   0.507.69
x   0       0                   0.000.00
r   1       0                   0.507.69
s   0       4                   2.0030.77
a   5       3                   4.0061.54
h   0       0                   0.000.00
k   0       0                   0.000.00
x   2       3                   2.5038.46
o   4       1                   2.5038.46
i   0       2                   1.0015.38
c   0       1                   0.507.69
CV   67       132                   99.50100
CVn   60       30                   45.0045.23
CVs   7       102                   54.5054.77