The Sunspot Observer - Average annual indices of solar activity NGDC - December, 1998

Statistics of sunspot activity

December, 1998

Visual indices of solar activity by National Geophysical Data Center

Date12345678910111213141516171819202122232425262728293031Average%
W135.50136.00129.50108.3388.0098.50129.50156.00121.33141.00155.25140.33140.00114.75107.00116.0073.0079.0079.0076.2566.3353.5065.6783.3384.0092.50141.25167.50132.25169.67128.00113.17100
Wn107.25115.50118.0093.6776.5067.0072.5069.0043.3338.7538.0033.3327.7518.0020.7528.0026.0037.0047.3357.7559.0050.7565.6774.6769.6775.25115.50130.00108.50132.33110.5068.6260.64
Ws28.2520.5011.5014.6711.5031.5057.0087.0078.00102.25117.25107.00112.2596.7586.2588.0047.0042.0031.6718.507.332.750.008.6714.3317.2525.7537.5023.7537.3317.5044.5539.36
n6.757.008.007.006.506.508.009.007.338.0010.008.008.256.257.007.004.504.254.335.254.003.004.335.675.005.506.006.004.756.675.506.30100
A0.750.502.500.670.500.000.500.670.000.001.000.001.000.501.501.330.250.250.331.001.000.751.001.000.670.500.250.000.251.001.500.6810.84
B0.751.001.001.001.000.000.000.000.001.502.251.001.000.251.251.000.500.000.330.750.330.251.001.000.670.751.501.000.000.330.500.7111.22
C1.752.001.002.330.502.502.503.002.001.751.000.671.501.250.501.330.750.501.000.750.000.500.671.331.000.751.001.501.251.671.501.2820.35
D0.750.500.000.000.502.002.003.002.001.500.751.671.251.501.001.001.251.250.330.250.330.751.001.332.333.252.252.000.750.000.001.1818.69
E0.000.500.000.000.000.000.000.000.330.500.750.330.251.001.001.000.251.001.331.250.330.250.000.000.000.000.751.001.501.670.500.507.94
F0.750.501.000.000.000.000.000.000.000.250.000.000.000.000.000.000.250.000.000.000.000.000.000.000.000.000.000.250.000.000.500.111.79
G2.002.001.501.671.500.500.500.671.331.251.250.670.750.250.000.000.250.750.670.251.330.500.000.000.000.000.000.000.250.331.000.6810.84
H0.000.000.000.000.500.500.000.000.000.250.000.000.000.000.000.000.000.000.000.000.000.000.330.000.000.000.000.000.000.000.000.050.81
I0.000.001.001.332.001.002.501.671.671.003.003.672.501.501.751.331.000.500.331.000.670.000.331.000.330.250.250.250.751.670.001.1017.53
x1.501.503.501.671.500.000.500.670.001.503.251.002.000.752.752.330.750.250.671.751.331.002.002.001.331.251.751.000.251.332.001.3922.06
r0.000.000.500.670.000.500.000.001.330.000.000.000.501.000.251.000.250.000.330.000.000.000.330.670.000.000.250.250.001.330.500.314.95
s1.251.002.002.672.003.504.005.673.674.505.005.004.753.753.253.002.252.002.002.250.670.751.331.672.672.501.751.752.251.671.002.6341.72
a2.504.501.500.671.501.503.002.671.671.251.002.001.000.750.500.671.252.001.331.252.001.250.331.331.001.752.002.501.751.671.001.5825.13
h1.000.000.500.671.000.500.000.000.000.250.000.000.000.000.250.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.132.13
k0.500.000.000.670.500.500.500.000.670.500.750.000.000.000.000.000.000.000.000.000.000.000.330.000.000.000.250.500.500.671.000.254.01
x0.750.503.502.003.001.503.002.331.671.254.003.673.502.003.252.671.250.750.672.001.670.751.672.001.000.750.500.251.002.671.501.8429.18
o5.255.503.505.003.505.004.506.005.336.005.004.004.002.752.753.332.502.502.332.002.002.002.673.674.003.753.753.502.002.333.003.6658.06
i0.501.001.000.000.000.000.500.330.000.250.750.330.751.500.750.670.751.001.331.250.330.250.000.000.000.751.250.751.001.000.500.609.47
c0.250.000.000.000.000.000.000.330.330.500.250.000.000.000.250.330.000.000.000.000.000.000.000.000.000.250.501.500.750.670.500.213.28
CV138.5097.0097.00114.67113.50119.50113.50136.00131.00141.75130.75103.6795.0091.0084.0077.3365.2580.0070.3364.0050.0038.2548.0051.0068.6788.7592.50117.2596.2594.6789.5093.50100
CVn125.5087.0087.00105.33108.0083.5073.0057.6746.0052.5043.7532.0017.0011.0011.5012.6711.2531.7534.6745.5046.3338.0048.0045.0045.6765.2571.2595.0079.7583.3380.0057.2361.21
CVs13.0010.0010.009.335.5036.0040.5078.3385.0089.2587.0071.6778.0080.0072.5064.6754.0048.2535.6718.503.670.250.006.0023.0023.5021.2522.2516.5011.339.5036.2738.79