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

Statistics of sunspot activity

Solar activity in 1998

Visual indices of solar activity by author's observations

 
Average by
month
I
II
III
IV
V
VI
VII
VIII
IX
X
XI
XII
days
months
N3142019192125191677214.3314.33
W35.0026.0049.5535.5372.0087.5798.88121.37137.0641.4379.29114.0077.8374.81
Wn17.004.368.455.9532.1135.6741.0078.3267.9424.5747.5756.5034.7234.95
Ws18.0021.6441.1029.5839.8951.4357.8843.0569.1316.8631.7157.5043.0539.81
n2.671.862.902.373.115.105.846.636.692.144.576.504.314.20
A0.670.140.100.160.320.380.560.630.310.000.140.000.320.28
B0.670.070.000.210.210.430.720.680.500.290.140.000.360.33
C1.000.070.400.740.321.241.440.891.310.430.861.000.830.81
D0.330.430.650.630.631.621.240.951.940.861.141.501.020.99
E0.000.290.550.050.680.100.240.370.630.140.430.000.340.29
F0.000.000.450.160.260.000.000.320.310.140.290.500.190.20
G0.000.140.100.260.050.050.000.210.250.140.001.000.130.18
H0.000.140.100.110.531.241.121.790.810.000.862.000.740.72
I0.000.570.550.050.110.050.520.790.630.140.710.500.400.39
x1.330.210.100.370.530.811.281.320.810.290.290.000.680.61
r0.000.360.600.260.320.860.680.790.560.000.290.500.520.44
s0.000.500.700.790.631.001.241.891.690.431.002.001.030.99
a1.000.430.700.740.951.762.041.532.881.292.004.001.451.61
h0.330.210.200.050.050.480.360.160.060.000.000.000.190.16
k0.000.140.600.160.630.190.240.950.690.141.000.000.440.40
x0.670.860.750.320.951.672.203.211.750.141.712.501.451.39
o1.330.570.901.370.582.332.041.952.631.140.572.501.531.49
i0.670.430.850.631.051.051.520.681.630.571.711.001.010.98
c0.000.000.400.050.530.050.080.790.690.290.570.500.320.33
CV28.6734.1470.6540.3267.4277.4876.84106.63119.1341.7193.7199.5073.5571.35
CVn8.674.868.356.2133.8931.7126.9270.4764.5627.0043.5745.0030.9230.93
CVs20.0029.2962.3034.1133.5345.7649.9236.1654.5614.7150.1454.5042.6340.41