The Sunspot Observer - Average annual indices of solar activity NGDC - April, 1989

Statistics of sunspot activity

April, 1989

Visual indices of solar activity by National Geophysical Data Center

Date123456789101112131415161718192021222324252627282930Average%
W149.80157.33182.60153.67105.86139.38192.75208.20181.33134.83152.50113.00103.00124.33144.50121.57189.83164.43183.86200.57192.86195.57175.50159.83142.86151.00144.80137.67136.67111.60155.06100
Wn59.2057.8355.8048.6730.0058.1395.00109.2092.8356.3363.7548.6767.0073.0084.3363.57107.1784.1499.43124.86103.2990.7192.0073.0052.4347.4040.2040.5045.1748.2070.3945.40
Ws90.6099.50126.80105.0075.8681.2597.7599.0088.5078.5088.7564.3336.0051.3360.1758.0082.6780.2984.4375.7189.57104.8683.5086.8390.43103.60104.6097.1791.5063.4084.6654.60
n8.208.839.007.505.868.0011.2511.4011.178.0010.757.336.576.836.676.437.837.008.009.2910.5711.148.758.177.868.206.606.506.176.008.20100
A2.002.331.401.500.712.131.500.801.830.503.251.500.711.170.501.140.500.000.140.291.001.001.000.670.291.401.200.830.330.401.0713.03
B2.202.834.202.171.140.751.752.002.001.670.751.171.571.671.330.710.500.000.431.860.571.000.751.671.711.201.001.171.331.201.4117.20
C1.601.171.601.330.861.384.003.802.332.332.000.831.001.501.830.432.001.712.292.714.574.432.751.332.712.400.801.502.001.202.0124.57
D0.000.170.000.671.142.002.753.403.331.171.502.001.430.330.330.861.501.431.711.290.862.292.003.331.430.200.000.000.000.401.2515.26
E0.000.000.000.000.000.000.000.200.170.170.000.000.001.171.671.141.671.000.570.430.140.000.500.670.861.802.201.500.670.000.556.71
F0.601.001.001.000.860.750.750.200.170.330.000.000.000.000.170.140.500.290.290.571.000.570.750.330.140.200.200.170.500.800.445.40
G0.400.000.000.170.000.130.250.801.001.000.750.000.860.830.170.710.171.571.291.140.290.430.000.170.570.600.601.330.500.800.556.72
H0.000.000.000.000.140.250.000.000.000.000.000.000.000.000.000.140.170.140.570.711.000.290.250.000.000.000.000.000.330.000.131.63
I1.401.330.800.671.000.630.250.200.330.832.501.831.000.170.671.140.830.860.710.291.141.140.750.000.140.400.600.000.501.200.789.49
x4.205.175.603.671.862.883.252.803.832.174.002.672.292.831.831.861.000.000.572.141.572.001.752.332.002.602.202.001.671.602.4830.23
r1.000.500.800.170.290.380.500.200.500.331.000.830.570.170.500.430.330.000.000.140.860.430.750.500.430.800.000.500.500.000.455.45
s2.001.830.602.331.002.131.501.802.331.832.751.171.001.672.170.861.001.711.141.292.003.431.251.171.142.801.200.831.002.201.6419.98
a0.000.330.800.331.711.384.754.402.502.002.502.672.291.171.001.863.002.292.291.862.433.292.753.002.860.201.201.001.171.201.9423.67
h0.000.170.200.000.430.380.250.400.500.330.250.000.000.000.000.000.500.570.861.141.571.000.750.501.000.801.401.331.330.800.556.70
k1.000.831.001.000.570.881.001.801.501.330.250.000.431.001.171.432.002.433.142.712.141.001.500.670.431.000.600.830.500.201.1413.97
x3.403.672.202.171.863.001.751.002.171.335.753.331.711.331.172.431.501.001.431.293.142.432.000.670.431.801.800.831.171.601.9824.14
o4.204.175.804.173.003.888.509.408.005.674.753.834.574.003.502.713.834.294.576.715.576.863.755.175.714.202.404.003.503.204.8058.53
i0.601.001.001.170.861.131.000.800.831.000.250.170.291.502.001.292.501.711.861.141.861.863.002.331.712.202.401.671.501.201.3917.01
c0.000.000.000.000.140.000.000.200.170.000.000.000.000.000.000.000.000.000.140.140.000.000.000.000.000.000.000.000.000.000.030.32
CV78.8083.3382.2092.8391.00122.88151.75195.80181.50131.83103.7562.5076.0098.17108.67112.57175.17195.57224.14217.86218.86191.43171.75142.33134.29146.20142.40142.67120.33100.60136.57100
CVn17.4024.509.0013.3319.0038.5065.25102.2096.1754.5048.0034.6753.5771.1769.3355.5780.1793.57122.00121.29111.5792.5784.2563.6738.0026.8014.8020.1720.0029.8056.3641.27
CVs61.4058.8373.2079.5072.0084.3886.5093.6085.3377.3355.7527.8322.4327.0039.3357.0095.00102.00102.1496.57107.2998.8687.5078.6796.29119.40127.60122.50100.3370.8080.2158.73