The Sunspot Observer - Average annual indices of solar activity - Solar activity in 1990 - October, 1990

Statistics of sunspot activity

October, 1990

Visual indices of solar activity by author's observations

Date01020304050607080910111213141516171819202122232425262728293031Average%
W                233              233.00100
Wn                111              111.0047.64
Ws                122              122.0052.36
n                12              12.00100
A                1              1.008.33
B                2              2.0016.67
C                1              1.008.33
D                1              1.008.33
E                0              0.000.00
F                0              0.000.00
G                2              2.0016.67
H                2              2.0016.67
I                3              3.0025.00
x                3              3.0025.00
r                2              2.0016.67
s                4              4.0033.33
a                0              0.000.00
h                1              1.008.33
k                2              2.0016.67
x                6              6.0050.00
o                3              3.0025.00
i                3              3.0025.00
c                0              0.000.00
CV                211              211.00100
CVn                114              114.0054.03
CVs                97              97.0045.97