The Sunspot Observer - Average annual indices of solar activity NGDC - Solar activity in 2001

Statistics of sunspot activity

Solar activity in 2001

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
N31283130303031313031303130.3330.33
W134.95119.96151.14151.89124.58188.21116.22147.50225.60185.52163.70203.23159.54159.37
Wn77.0360.7678.0275.7580.07123.6257.8473.01104.24102.6685.78100.3685.0184.93
Ws57.9259.2073.1276.1444.5164.6058.3874.49121.3682.8577.92102.8874.5474.45
n8.137.687.888.677.5210.607.638.4510.9310.408.1910.508.898.88
A0.960.970.800.890.820.820.670.550.600.730.410.520.730.73
B0.600.860.550.390.480.480.590.460.490.710.300.630.540.55
C1.941.581.411.401.202.321.461.281.491.891.342.141.621.62
D2.171.841.772.111.423.261.832.613.192.642.473.362.392.39
E0.450.250.530.230.440.480.370.270.760.760.501.190.520.52
F0.130.030.460.440.320.310.080.321.130.280.590.340.370.37
G0.290.650.890.700.601.060.300.470.810.920.610.750.670.67
H0.010.000.040.040.030.150.080.070.100.100.100.050.060.06
I1.591.521.432.462.201.722.262.422.362.371.861.531.981.97
x1.561.821.351.291.291.301.261.011.091.440.711.151.271.27
r0.410.590.630.490.280.230.310.370.220.190.260.250.350.35
s3.252.702.513.072.853.563.293.223.963.853.114.073.293.29
a2.662.542.832.752.694.512.643.003.633.342.243.453.023.02
h0.010.010.070.080.060.150.060.040.080.060.100.060.060.07
k0.250.030.480.980.340.840.080.811.941.521.771.520.880.88
x2.562.482.273.393.052.693.013.033.063.202.382.092.772.77
o4.794.764.334.443.586.724.064.255.565.674.156.374.894.89
i0.650.451.040.710.891.140.541.101.531.141.141.510.990.99
c0.140.000.250.130.010.050.020.060.780.390.520.520.240.24
CV108.5690.21123.28138.10104.40179.3297.55136.78226.01185.92174.58206.01147.80147.56
CVn62.0350.5669.3068.3074.58126.1146.6964.12101.1099.0193.5599.2279.6179.55
CVs46.5339.6553.9969.8029.8153.2250.8572.66124.9086.9181.03106.8068.2068.01