AAVSO Sudden Ionospheric Disturbance Report 
     November 1989
  
     Observers:
     A-01   A-03   A-09   A-19   A-46   
     A-50   A-52   A-59   A-61   A-62
     A-63   A-64   A-65   
     
     YYMMDD      Event Peak (UT)   Importance
     891101         1514                1  
     891101         1618                1  
     891102         1252                2  
     891103         1958                2+ 
     891104         1730                2+ 
     891104         2121                1+ 
     891105         1333                1+ 
     891106         1346                2+ 
     891106         1846                2  
     891106         2046                2+ 
     891107         1459                2  
     891107         1659                2+ 
     891107         1840                2  
     891107         1932                2  
     891107         2033                2+ 
     891108         1419                1- 
     891108         1733                2  
     891108         1835                2+ 
     891108         1910                2+ 
     891109         1240                1- 
     891109         1404                2  
     891109         1455                2+ 
     891109         1558                2+ 
     891109         1703                2  
     891109         1749                2+ 
     891109         1859                2  
     891109         1931                2+ 
     891109         2055                1+ 
     891110         1559                1- 
     891110         1615                1+ 
     891110         1652                3  
     891110         1947                2  
     891111         1832                2+ 
     891112         1307                1+ 
     891112         1742                1  
     891112         1919                1+ 
     891113         2014                2+ 
     891115         1933                2+ 
     891116         1320                2+ 
     891117         1703                1+ 
     891117         1753                1- 
     891118         1615                3+ 
     891119         1614                2  
     891120         1428                2+ 
     891120         2135                2+ 
     891121         1346                2  
     891122         1338                1+ 
     891126         1815                3+ 
     891127         1618                2  
     891127         1710                1  
     891127         1738                2+ 
     891128         1629                1+ 
     891128         1826                1+ 
     *******************************************
     Importance Summary November 1989
        1- events:  4
        1  events:  4
        1+ events:  10
        2  events:  13
        2+ events:  19
        3  events:  1
        3+ events:  2
     Total events:  53