The Sunspot Observer - Average annual indices of solar activity NGDC - April, 1999

Statistics of sunspot activity

April, 1999

Visual indices of solar activity by National Geophysical Data Center

Date123456789101112131415161718192021222324252627282930Average%
W53.0054.6768.0089.75109.50122.25122.67126.25135.00118.00103.67110.25107.67  78.0091.0083.0069.5072.7561.5056.6770.0068.2565.0069.00 76.67110.00118.5089.28100
Wn27.7522.3331.7542.2552.5045.0058.6769.2567.0060.7549.0031.0022.33  7.0018.0021.2532.5033.2519.0016.6724.6734.2549.6756.75 65.67104.50118.5043.7549.00
Ws25.2532.3336.2547.5057.0077.2564.0057.0068.0057.2554.6779.2585.33  71.0073.0061.7537.0039.5042.5040.0045.3334.0015.3312.25 11.005.500.0045.5351.00
n4.504.334.505.005.006.256.336.257.675.255.006.006.33  5.506.506.004.504.503.753.004.004.754.004.00 4.007.006.255.19100
A0.501.000.250.751.000.500.671.500.670.000.000.500.67  2.001.001.500.250.750.500.001.001.250.000.00 0.001.001.500.6913.38
B0.250.331.251.000.001.001.330.502.000.500.671.251.33  1.001.002.000.500.750.500.000.001.501.000.50 0.331.000.250.8115.52
C0.501.000.251.001.001.250.000.750.670.250.671.752.67  1.501.500.751.751.001.001.672.001.250.330.75 1.001.751.751.1021.22
D0.000.001.752.002.001.502.672.504.003.752.672.001.33  1.001.000.501.501.750.750.671.000.502.332.00 0.670.250.251.4928.78
E0.000.000.000.000.500.000.330.000.000.500.670.250.00  0.000.000.000.000.000.000.000.000.000.000.00 0.000.501.000.142.68
F0.000.000.000.000.000.000.000.250.000.000.000.000.00  0.000.000.000.000.000.000.000.000.000.000.00 0.000.000.500.030.54
G0.000.000.000.000.501.751.000.500.000.000.330.250.00  0.000.500.250.000.250.000.330.000.000.000.00 1.000.500.500.285.47
H0.000.000.000.000.000.000.000.000.000.000.000.000.00  0.000.000.000.000.000.000.000.000.000.000.00 0.000.000.000.000.00
I3.252.001.000.250.000.250.330.250.330.250.000.000.33  0.001.501.000.500.001.000.330.000.250.330.75 1.002.000.500.6512.43
x0.751.331.501.751.001.502.002.002.670.500.671.752.00  3.002.003.500.751.501.000.001.002.751.000.50 0.332.001.751.5028.89
r0.250.000.250.000.000.000.330.250.000.250.330.500.00  0.000.500.250.500.000.000.000.670.250.000.25 0.330.250.750.224.22
s3.002.332.501.501.002.000.331.001.671.251.672.502.67  0.501.501.502.002.251.251.670.330.252.331.50 1.333.251.751.6631.99
a0.500.670.251.753.002.753.672.503.333.252.331.251.67  2.002.500.751.250.751.501.332.001.500.671.75 1.001.001.751.7333.29
h0.000.000.000.000.000.000.000.250.000.000.000.000.00  0.000.000.000.000.000.000.000.000.000.000.00 0.330.000.000.020.42
k0.000.000.000.000.000.000.000.250.000.000.000.000.00  0.000.000.000.000.000.000.000.000.000.000.00 0.670.500.250.061.19
x3.753.001.251.001.000.751.001.751.000.250.000.501.00  2.002.502.500.750.751.500.331.001.500.330.75 1.003.002.001.3425.80
o0.751.333.253.752.505.504.333.755.674.004.335.005.33  3.504.003.503.753.252.002.673.003.253.673.00 3.003.502.753.4967.30
i0.000.000.000.251.500.001.000.750.670.750.670.500.00  0.000.000.000.000.500.250.000.000.000.000.25 0.000.501.500.346.48
c0.000.000.000.000.000.000.000.000.330.250.000.000.00  0.000.000.000.000.000.000.000.000.000.000.00 0.000.000.000.020.42
CV36.0030.6757.0058.0076.5086.7587.0096.25104.3396.5088.3375.0060.33  36.5059.0036.7555.5060.5036.0040.0035.0025.5064.3357.00 77.3379.0083.2562.90100
CVn23.0019.0022.7519.5032.0031.2541.6744.0047.3335.2527.0018.255.67  1.0020.0011.0029.5026.008.2510.009.008.0052.0047.50 68.3374.0083.2530.1747.96
CVs13.0011.6734.2538.5044.5055.5045.3352.2557.0061.2561.3356.7554.67  35.5039.0025.7526.0034.5027.7530.0026.0017.5012.339.50 9.005.000.0032.7352.04