The Sunspot Observer - Average annual indices of solar activity NGDC - January, 1991

Statistics of sunspot activity

January, 1991

Visual indices of solar activity by National Geophysical Data Center

Date12345678910111213141516171819202122232425262728293031Average%
W181.50141.14136.60151.75101.50147.14134.29119.00117.00121.86156.50176.67201.40170.83187.60211.50154.50180.33160.17147.75147.50137.80161.00187.00224.14224.40285.00362.33345.00329.29348.00188.73100
Wn36.6724.4322.0026.2513.0028.7128.4346.8362.0070.2988.50103.33118.0090.8382.8090.0065.7565.6754.3364.5058.3345.8040.6048.2045.8658.8074.50104.1786.5085.7184.2061.7732.73
Ws144.83116.71114.60125.5088.50118.43105.8672.1755.0051.5768.0073.3383.4080.00104.80121.5088.75114.67105.8383.2589.1792.00120.40138.80178.29165.60210.50258.17258.50243.57263.80126.9567.27
n11.008.438.607.757.509.439.147.676.175.577.006.837.206.507.008.507.508.508.678.758.837.208.007.409.438.2010.7512.5011.5011.5711.808.54100
A2.331.432.000.500.500.861.141.670.670.711.171.501.201.001.601.671.251.502.830.502.001.601.000.201.430.600.751.671.170.710.801.2214.33
B2.000.861.001.501.501.711.141.170.500.431.832.001.202.001.201.672.000.831.001.001.670.202.002.602.861.001.251.501.671.711.801.4516.91
C4.332.711.401.502.002.142.141.000.330.430.830.672.201.001.402.001.501.671.002.251.330.601.401.601.571.402.001.831.331.861.601.5818.51
D1.831.861.601.002.003.143.001.170.831.430.170.671.000.671.201.671.752.502.002.252.332.400.800.400.862.202.252.671.502.431.401.6419.24
E0.000.000.000.250.000.000.000.170.170.140.000.000.000.000.000.170.000.330.670.500.170.400.000.400.290.400.501.332.171.431.400.354.11
F0.000.000.000.000.000.000.000.000.000.140.670.330.200.170.000.170.000.000.000.000.500.200.001.001.141.201.250.830.670.861.600.354.12
G0.170.290.200.750.000.290.140.671.170.711.001.331.401.671.601.171.001.171.170.500.501.001.800.600.861.001.001.501.501.431.200.9310.86
H0.000.000.000.000.000.000.290.330.000.000.000.000.000.000.000.000.000.000.000.500.170.400.000.000.000.000.250.000.000.140.400.080.94
I0.331.292.402.251.501.291.291.502.501.571.330.330.000.000.000.000.000.500.001.250.170.401.000.600.430.401.501.171.501.001.600.9410.98
x4.332.293.002.002.002.572.292.831.171.143.003.502.403.002.803.333.252.333.831.503.671.803.002.804.291.602.003.172.832.432.602.6731.24
r0.330.430.200.250.000.140.570.170.500.570.670.000.000.330.200.330.251.000.331.250.170.000.401.000.000.200.500.670.170.570.400.374.38
s1.671.712.003.505.002.712.712.171.671.000.330.171.000.170.200.170.000.830.330.500.331.001.200.801.001.401.752.502.332.002.001.4216.67
a4.674.003.402.000.504.002.860.831.331.141.001.332.601.172.402.832.252.502.003.753.172.401.200.801.572.203.253.002.672.572.202.3127.03
h0.000.000.000.000.000.000.140.000.000.000.000.000.000.000.000.000.000.000.170.000.000.000.000.000.430.600.750.000.000.140.400.080.99
k0.000.000.000.000.000.000.571.671.501.712.001.831.201.831.401.831.751.832.001.751.502.002.202.002.142.202.503.173.503.864.201.6819.69
x2.672.714.402.752.002.142.713.503.172.292.501.831.201.001.601.671.252.002.832.252.332.402.000.801.861.002.502.832.671.862.802.2426.25
o7.835.293.804.505.507.146.433.672.502.713.834.505.805.335.005.835.005.505.005.255.173.606.005.206.145.206.507.335.676.435.005.2561.41
i0.500.430.400.500.000.140.000.330.500.570.670.500.200.170.400.831.251.000.831.251.331.200.001.001.141.601.501.171.831.862.800.849.78
c0.000.000.000.000.000.000.000.170.000.000.000.000.000.000.000.170.000.000.000.000.000.000.000.400.290.400.251.171.331.431.200.222.57
CV87.3381.7173.0083.7587.50107.00120.57115.33105.83109.00108.83107.67106.40108.17107.00131.67115.50147.00145.33146.75130.83148.80130.80128.00161.71197.00227.00254.00254.67274.29286.60141.58100
CVn13.8314.4310.2011.5011.0016.5735.0062.0061.1746.1451.3356.8361.6049.1752.8059.3360.0079.8381.0071.2539.5041.4035.0027.2019.4344.8042.0056.3357.6765.1453.0044.7231.59
CVs73.5067.2962.8072.2576.5090.4385.5753.3344.6762.8657.5050.8344.8059.0054.2072.3355.5067.1764.3375.5091.33107.4095.80100.80142.29152.20185.00197.67197.00209.14233.6096.8668.41