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

Statistics of sunspot activity

December, 1991

Visual indices of solar activity by National Geophysical Data Center

Date12345678910111213141516171819202122232425262728293031Average%
W146.33131.57174.40147.86169.71211.17245.17235.83302.67289.80267.00229.50225.67240.20206.57158.40155.71147.20174.75151.80146.17162.00181.00166.00210.50176.00183.50174.00168.50143.83118.50188.43100
Wn39.0036.5761.0062.5779.00108.17136.33114.67130.33113.00108.2582.6772.6785.6080.0054.6056.4353.4031.7514.809.3310.404.800.003.672.400.000.002.677.0012.0050.7426.93
Ws107.3395.00113.4085.2990.71103.00108.83121.17172.33176.80158.75146.83153.00154.60126.57103.8099.2993.80143.00137.00136.83151.60176.20166.00206.83173.60183.50174.00165.83136.83106.50137.6973.07
n9.178.2910.008.007.868.509.839.8312.1712.4011.508.838.8310.6010.437.407.298.6010.759.208.506.606.006.577.676.605.504.714.834.504.758.25100
A2.003.291.801.140.710.831.671.330.831.001.000.500.502.002.571.000.861.401.501.202.501.000.600.570.830.200.330.430.500.171.001.1413.79
B2.670.862.400.860.140.831.000.330.832.001.250.500.671.201.290.200.571.802.002.600.170.600.400.430.500.600.000.290.330.330.000.8910.81
C1.331.001.200.861.572.172.002.004.172.602.001.831.001.802.002.601.710.802.251.401.170.400.801.002.671.200.670.290.170.330.501.4717.79
D2.172.863.002.863.142.331.671.831.673.002.751.001.831.401.431.801.711.803.253.202.332.602.402.001.170.801.001.291.171.001.001.9824.03
E0.000.000.200.710.711.172.171.832.832.401.501.000.670.400.570.600.570.200.250.000.000.200.200.290.170.600.670.290.670.670.000.698.42
F0.000.000.200.140.140.000.000.000.000.200.500.831.001.000.290.000.000.400.000.400.000.200.600.861.171.201.331.431.171.671.750.536.44
G0.000.140.200.570.140.330.331.670.500.602.002.171.831.601.291.201.571.401.250.400.831.001.001.430.831.000.670.570.830.330.250.9010.93
H0.000.000.200.140.140.000.170.000.170.000.000.000.000.000.000.000.290.000.000.000.000.200.000.000.000.000.000.000.000.000.000.040.51
I1.000.140.800.711.140.830.830.831.170.600.501.001.331.201.000.000.000.800.250.001.500.400.000.000.331.000.830.140.000.000.250.607.28
x4.674.144.202.000.861.672.671.671.673.002.251.001.173.203.861.201.433.203.503.802.671.601.001.001.330.800.330.710.830.501.002.0324.60
r0.170.430.400.140.140.330.000.170.330.600.250.170.000.600.140.200.430.000.000.200.170.000.000.000.330.000.170.000.000.000.000.172.10
s1.170.712.201.713.291.331.171.173.502.800.501.001.001.602.431.200.000.601.000.801.670.200.400.571.001.801.170.570.170.670.501.2214.82
a2.001.571.202.572.004.004.504.834.003.005.003.673.672.402.143.003.002.204.252.602.002.001.802.142.001.000.830.431.000.331.752.4830.07
h0.170.290.400.430.430.000.330.170.170.400.000.170.170.600.290.400.570.200.000.200.000.000.000.000.170.400.000.000.000.000.000.192.32
k1.001.141.601.141.141.171.171.832.502.603.502.832.832.201.571.401.862.402.001.602.002.802.802.862.832.603.003.002.833.001.502.1526.09
x3.003.432.802.002.001.672.672.172.171.601.501.501.833.203.571.001.142.201.751.204.001.600.600.571.171.201.170.570.500.171.251.7821.58
o5.173.866.004.714.435.004.835.336.677.407.755.335.335.605.575.405.435.808.507.003.673.603.404.144.333.202.001.712.171.501.504.7257.23
i1.001.001.201.001.001.332.001.672.833.402.001.831.501.200.860.800.710.600.501.000.831.001.200.571.000.801.832.001.832.502.001.3916.82
c0.000.000.000.290.430.500.330.670.500.000.250.170.170.600.430.200.000.000.000.000.000.400.801.291.171.400.500.430.330.330.000.364.37
CV101.67111.86153.20154.57165.43141.67161.33196.17235.17245.00249.75207.67209.83203.00165.29149.60159.86160.80170.00145.60139.33165.80175.40189.00184.83192.00173.33163.00158.50164.50112.00171.13100
CVn15.1727.0070.2072.8685.2979.6794.17108.33106.3381.4077.2563.8356.6763.4056.8648.6057.7150.6019.252.400.831.400.600.000.330.200.000.001.330.833.5040.1923.49
CVs86.5084.8683.0081.7180.1462.0067.1787.83128.83163.60172.50143.83153.17139.60108.43101.00102.14110.20150.75143.20138.50164.40174.80189.00184.50191.80173.33163.00157.17163.67108.50130.9476.51