AAVSO Sudden Ionospheric Disturbance Report 
     January 1999
  
     Observers:
     A-40   A-50   A-52   A-62   A-63   
     A-72   A-80   A-82   A-84   A-90   
     
     YYMMDD      Event Peak (UT)   Importance
     990101         1405                2  
     990103         1510                2+ 
     990103         1907                2  
     990103         1950                1+ 
     990104         0835                1- 
     990108         1025                2+ 
     990112         1156                2  
     990113         0610                1- 
     990113         0725                1- 
     990113         1433                1- 
     990113         1507                2  
     990113         1540                1- 
     990113         1858                2+ 
     990113         2015                1  
     990114         0910                1  
     990114         1017                2+ 
     990114         1350                1- 
     990114         1545                1  
     990114         1555                2  
     990114         1656                1- 
     990114         1904                2+ 
     990115         0140                1- 
     990115         0301                1  
     990115         0530                1- 
     990115         0609                1+ 
     990115         0643                3  
     990115         1445                1+ 
     990115         1912                2  
     990115         2000                2+ 
     990116         0804                1  
     990116         0904                1- 
     990116         0926                1  
     990116         1209                2  
     990116         1305                1+ 
     990116         1442                1  
     990116         1642                1+ 
     990116         1750                2+ 
     990116         1909                1+ 
     990116         1957                2  
     990117         0524                1  
     990117         1117                1- 
     990117         1616                1  
     990117         1702                1+ 
     990117         1834                2  
     990117         1954                2  
     990118         0730                1- 
     990118         0740                1- 
     990118         0800                2+ 
     990118         0940                1- 
     990118         1240                1+ 
     990118         1314                1  
     990118         1520                1+ 
     990118         1904                2  
     990119         0135                1+ 
     990119         0507                1  
     990119         0807                1  
     990119         1409                1  
     990119         2025                1+ 
     990119         2245                2  
     990120         1420                1  
     990120         1930                3+ 
     990122         0540                1  
     990122         0707                1  
     990122         1330                1+ 
     990122         1722                2+ 
     990123         1355                1  
     990123         1513                1  
     990123         1539                2  
     990123         1915                1  
     990123         2131                1  
     990123         2354                1+ 
     990124         0500                2  
     990124         0820                2  
     990124         1235                1  
     990125         0100                2+ 
     990125         0746                2+ 
     990126         1155                2  
     990126         1846                2  
     990127         1650                2+ 
     990129         1455                1  
     *******************************************
     Importance Summary January 1999
        1- events:  14
        1  events:  22
        1+ events:  13
        2  events:  17
        2+ events:  12
        3  events:  1
        3+ events:  1
     Total events:  80