The Sunspot Observer - Average annual indices of solar activity - Solar activity in 1997

Statistics of sunspot activity

Solar activity in 1997

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
N15119172126292118157316.0016.00
W2.605.459.6711.1823.1916.427.8619.1045.5626.1344.8626.0018.3519.83
Wn1.672.645.670.0016.3310.777.0017.3820.2818.4730.7126.0011.6213.08
Ws0.932.824.0011.186.865.650.861.7125.287.6714.140.006.736.76
n0.200.360.780.761.711.080.551.142.331.732.431.001.141.17
A0.000.000.110.000.100.040.210.100.000.000.140.000.070.06
B0.000.000.000.000.100.040.000.000.000.130.000.000.030.02
C0.130.090.220.290.330.150.030.190.170.470.570.000.210.22
D0.070.180.000.410.480.460.280.240.780.400.290.000.350.30
E0.000.000.000.000.000.000.000.100.560.070.861.000.110.22
F0.000.000.000.000.000.000.000.000.110.000.000.000.010.01
G0.000.000.000.000.100.000.000.000.220.000.140.000.040.04
H0.000.000.110.000.290.000.000.380.110.000.140.000.090.09
I0.000.090.330.060.330.380.030.140.390.670.290.000.230.23
x0.000.000.110.000.190.080.210.100.000.130.140.000.090.08
r0.130.180.220.290.670.500.000.050.110.400.860.000.280.28
s0.070.180.440.290.520.190.210.620.440.200.140.000.310.28
a0.000.000.000.180.330.310.140.381.441.001.000.000.410.40
h0.000.000.000.000.000.000.000.000.000.000.000.000.000.00
k0.000.000.000.000.000.000.000.000.330.000.291.000.060.14
x0.000.090.560.060.710.420.240.620.500.670.570.000.400.37
o0.200.090.220.350.900.350.140.240.560.730.710.000.390.37
i0.000.180.000.350.100.310.170.140.890.271.140.670.290.35
c0.000.000.000.000.000.000.000.140.390.070.000.330.060.08
CV1.935.185.3311.5917.5712.777.7215.5754.5018.6041.0050.0017.0820.15
CVn1.072.823.890.0014.006.127.4114.6720.6711.8735.2950.0010.4413.98
CVs0.872.361.4411.593.576.650.310.9033.836.735.710.006.646.16
gr0.200.270.600.591.240.850.380.712.061.471.861.000.890.94
grfp0.330.631.401.474.293.191.454.4815.725.8014.2911.004.475.34
grf0.271.091.101.881.812.190.762.766.222.735.715.002.292.63
efp0.000.090.100.120.380.190.000.330.280.270.430.000.190.18
ef0.000.000.100.060.050.080.210.100.000.000.140.000.070.06
Cond2.672.552.602.592.102.232.222.142.812.802.353.502.432.55