During June 1999 the Sun had staked 57 geomagnetic quiet (Ap<20 nT) semi diurnal intervals and 3
 stormy ones.
SSM had predicted 52  GQIs and 0 GSI .
SEC - 57 GQIs and 0 GSIs, Meudon - 50 GQIs and 1 GSIs.
So one can see:
 
Rating list for April 99
Place GQIs GSIs Total
1 SEC : 1 M : 0.33 SEC : 0.95
2 SMM : 0.91 SMM&SEC: 0 SMM : 0.87
3
M : 0.88 - M : 0.85

 
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