The Sunspot Observer - Average annual indices of solar activity NGDC - February, 2001

Statistics of sunspot activity

February, 2001

Visual indices of solar activity by National Geophysical Data Center

Date12345678910111213141516171819202122232425262728Average%
W117.67104.00129.33146.50146.50161.67156.25168.00169.00153.00157.25102.67107.33105.00109.5090.5095.25114.25122.25111.33118.75121.75115.00101.6790.5085.5078.6779.67119.96100
Wn98.3396.00106.33106.5080.0078.0096.0089.75101.0080.5085.5067.6748.6761.3354.2548.5049.5035.5036.0022.6726.5030.7524.5030.0030.0036.5044.6736.3360.7650.65
Ws19.338.0023.0040.0066.5083.6760.2578.2568.0072.5071.7535.0058.6743.6755.2542.0045.7578.7586.2588.6792.2591.0090.5071.6760.5049.0034.0043.3359.2049.35
n7.336.678.679.009.259.338.2510.009.759.5010.007.678.007.678.757.257.507.758.257.337.508.006.756.335.504.504.004.677.68100
A0.330.672.331.751.250.671.252.000.250.500.750.671.670.671.000.751.500.251.500.670.501.001.501.671.250.000.000.670.9612.55
B1.000.000.670.252.001.331.002.001.000.251.500.330.000.000.751.251.001.253.000.000.002.251.000.330.000.500.670.670.8611.15
C1.331.331.002.001.752.671.501.502.752.503.002.001.332.001.501.501.002.251.002.001.000.501.000.671.251.001.331.671.5820.60
D2.332.002.671.252.251.001.751.502.752.501.501.332.332.001.501.001.251.751.503.004.002.251.501.671.502.001.000.331.8423.90
E0.000.330.001.250.750.670.501.500.750.000.250.000.000.000.000.000.000.000.000.000.000.000.000.000.250.000.330.330.253.21
F0.000.000.000.250.000.000.250.000.250.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.030.35
G1.671.001.330.500.752.332.001.251.751.500.751.000.000.000.000.000.250.000.000.000.000.001.000.670.500.000.000.000.658.48
H0.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.00
I0.671.330.671.750.500.670.000.250.252.252.252.332.673.004.002.752.502.251.251.672.002.000.751.330.751.000.671.001.5219.75
x1.330.673.002.003.252.002.254.001.250.752.251.001.670.671.752.002.501.504.500.670.503.252.502.001.250.500.671.331.8223.70
r0.330.000.000.501.001.000.500.250.000.501.000.330.670.000.000.251.251.251.000.330.000.001.501.330.250.501.001.670.597.63
s3.003.672.672.501.251.332.001.753.255.003.253.673.675.335.503.502.253.251.003.005.252.750.751.001.502.500.670.332.7035.13
a2.672.333.004.003.504.673.503.755.253.253.252.672.001.671.501.501.501.751.753.331.752.002.002.002.501.001.671.332.5433.04
h0.000.000.000.000.000.000.000.000.000.000.250.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.010.12
k0.000.000.000.000.250.330.000.250.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.030.39
x1.002.003.003.501.751.331.252.250.502.753.003.004.333.675.003.504.002.502.752.332.503.002.253.002.001.000.671.672.4832.30
o6.334.335.674.006.507.336.255.758.256.256.504.673.674.003.753.753.505.004.755.004.505.004.253.333.003.502.002.334.7661.89
i0.000.330.001.501.000.670.752.001.000.500.500.000.000.000.000.000.000.250.750.000.500.000.250.000.500.001.330.670.455.81
c0.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.00
CV108.33104.33107.67106.50106.75120.33114.25122.75150.00133.00110.2592.0087.3395.6789.7563.2561.5075.0054.2594.33122.5075.2562.5060.0066.7563.0045.3333.3390.21100
CVn86.33103.67105.3386.0068.2561.0069.2569.5092.7570.7557.5059.3351.0055.0057.0042.7538.0025.2512.5018.3332.0029.0019.7520.0020.7522.0023.0019.6750.5656.05
CVs22.000.672.3320.5038.5059.3345.0053.2557.2562.2552.7532.6736.3340.6732.7520.5023.5049.7541.7576.0090.5046.2542.7540.0046.0041.0022.3313.6739.6543.95