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

Statistics of sunspot activity

Solar activity in 1998

Visual indices of solar activity by National Geophysical Data Center

 
Average by
month
I
II
III
IV
V
VI
VII
VIII
IX
X
XI
XII
days
months
N31283130243031313031243129.3329.33
W48.0950.1473.9168.6375.1185.2889.23106.97110.8771.3499.82113.1782.7682.71
Wn18.9015.1815.3114.0831.3539.8338.2368.3356.6243.3757.2568.6238.9338.92
Ws29.1934.9658.6154.5643.7545.4551.0038.6454.2527.9742.5644.5543.8343.79
n3.123.374.034.233.305.485.876.346.444.415.426.304.884.86
A0.810.720.670.750.550.551.010.780.550.770.630.680.710.71
B1.101.050.710.900.291.311.110.880.711.010.660.710.880.87
C0.450.480.730.960.451.441.521.351.630.821.571.281.061.06
D0.400.380.550.790.520.840.870.861.241.090.511.180.780.77
E0.070.180.310.060.510.040.050.120.270.070.200.500.190.20
F0.090.000.310.020.200.020.000.270.180.000.180.110.120.12
G0.080.080.140.390.290.110.110.590.510.270.540.680.310.32
H0.000.010.040.020.010.160.120.150.030.030.120.050.070.06
I0.110.470.570.340.481.011.071.321.310.361.021.100.760.76
x1.911.781.381.650.841.862.121.671.261.781.281.391.601.58
r0.140.270.250.210.090.340.580.260.320.300.160.310.270.27
s0.520.791.151.421.091.851.592.022.711.242.022.631.591.59
a0.430.240.610.600.750.870.981.211.380.821.191.580.890.89
h0.050.100.140.160.120.340.310.220.100.100.270.130.170.17
k0.060.200.490.190.420.220.280.960.660.180.490.250.370.37
x0.921.211.281.111.051.732.202.261.891.171.771.841.551.53
o1.911.922.022.861.263.503.373.453.872.893.123.662.852.82
i0.260.220.430.190.680.170.190.270.400.190.320.600.320.33
c0.030.020.310.080.320.080.100.350.280.170.200.210.180.18
CV26.3533.0763.1954.4562.5266.6765.45104.80101.0153.7782.5193.5067.3067.27
CVn5.935.858.286.6625.4924.6623.8067.8454.5431.8045.9857.2329.8229.84
CVs20.4327.2354.9147.7937.0342.0141.6536.9546.4621.9836.5236.2737.4837.44