The Sunspot Observer - Average annual indices of solar activity NGDC - February, 1990

Statistics of sunspot activity

February, 1990

Visual indices of solar activity by National Geophysical Data Center

Date12345678910111213141516171819202122232425262728Average%
W223.00223.80174.00155.43115.5096.33104.75128.50118.5099.5792.7195.83117.40101.17104.1762.6363.2087.00135.43179.83178.80247.33279.71327.83286.83279.80272.20259.20164.66100
Wn139.67136.40130.50124.8691.0059.0066.0073.2569.0067.0064.0074.1791.2076.8366.3341.7537.4032.2954.0071.8362.2078.6797.29120.00110.00114.80107.40101.2084.2251.15
Ws83.3387.4043.5030.5724.5037.3338.7555.2549.5032.5728.7121.6726.2024.3337.8320.8825.8054.7181.43108.00116.60168.67182.43207.83176.83165.00164.80158.0080.4448.85
n12.1712.209.839.295.835.006.509.008.336.866.145.677.606.677.004.385.007.009.149.838.8011.5011.8614.0014.5014.6014.0012.209.10100
A0.672.001.171.860.830.000.501.250.500.861.291.172.203.172.831.752.001.862.291.501.202.331.002.331.831.201.601.401.5216.70
B2.171.600.500.710.501.171.001.752.832.431.141.332.601.502.170.750.201.712.002.001.402.331.291.671.332.402.001.401.5717.22
C2.672.802.332.572.002.001.752.502.172.002.291.831.200.831.001.001.400.861.432.171.201.832.432.172.673.201.402.601.9421.30
D3.833.403.002.432.000.831.251.751.330.710.290.170.800.670.830.630.000.000.572.172.402.173.572.172.331.803.602.801.7018.63
E0.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.861.171.000.831.001.501.501.601.000.600.394.34
F0.330.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.200.331.000.000.170.000.000.000.070.80
G1.501.400.500.000.000.330.500.000.000.000.140.000.400.500.170.000.000.000.000.000.400.670.712.001.830.800.400.600.465.04
H0.000.400.830.140.000.000.001.000.670.430.290.000.000.000.000.000.400.860.710.170.000.000.000.000.000.000.200.000.222.39
I1.000.601.501.570.500.671.500.750.830.430.711.170.400.000.000.251.001.711.290.671.001.000.862.172.833.603.802.801.2413.58
x2.833.601.672.571.331.171.503.003.333.292.432.504.804.675.002.502.203.574.293.502.604.672.294.003.173.603.602.803.0933.92
r0.330.200.000.000.000.000.501.250.670.860.860.670.800.000.000.000.000.430.140.500.200.330.431.000.330.400.400.000.374.04
s1.832.002.832.861.500.501.250.251.670.710.710.830.000.330.170.751.201.431.571.331.601.672.573.503.504.004.202.801.7018.66
a6.175.004.503.713.003.333.253.251.671.001.290.671.000.670.830.250.600.571.713.333.403.004.714.005.334.603.604.202.8130.86
h0.000.400.170.140.000.000.000.250.170.000.000.000.400.500.500.380.400.290.000.000.200.170.140.000.000.200.600.400.192.08
k1.001.000.670.000.000.000.001.000.831.000.861.000.600.500.500.500.600.711.431.170.801.671.711.502.171.801.602.000.9510.44
x1.673.003.503.571.330.672.003.002.001.712.292.332.603.172.832.003.404.434.292.332.203.331.864.504.674.805.604.202.9732.67
o10.008.006.335.003.503.673.256.006.175.143.433.005.003.173.832.381.602.573.865.504.806.177.147.837.507.806.606.405.2057.14
i0.501.200.000.711.000.671.250.000.170.000.430.330.000.330.330.000.000.000.711.831.801.672.430.830.831.201.001.400.748.10
c0.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.000.290.170.000.330.430.831.500.800.800.200.192.10
CV175.33177.40140.6798.2967.0048.0067.00104.7594.0070.4362.8659.6768.2065.6766.5053.0058.2064.00109.00132.33133.20165.67218.14208.00244.17214.00224.00200.40121.07100
CVn101.83105.2093.8380.4355.5038.8354.7576.5067.6759.4354.8656.5065.2063.0062.1748.6349.0042.5736.4345.0040.0056.5084.7184.5091.0076.2090.0093.0066.9055.26
CVs73.5072.2046.8317.8611.509.1712.2528.2526.3311.008.003.173.002.674.334.389.2021.4372.5787.3393.20109.17133.43123.50153.17137.80134.00107.4054.1744.74