AAVSO Sudden Ionospheric Disturbance Report August 1989 Observers: A-01 A-03 A-09 A-19 A-46 A-50 A-52 A-61 A-62 A-63 A-64 A-65 YYMMDD Event Peak (UT) Importance 890801 0656 1 890801 0931 1- 890801 0948 1 890802 0748 2+ 890802 2313 1 890803 0700 1- 890803 0748 2+ 890803 1637 2 890803 2047 1+ 890805 0558 2+ 890805 1029 1+ 890805 1623 2+ 890805 1955 2 890806 0750 2+ 890806 1011 2 890806 1207 2+ 890807 0930 2+ 890807 2055 2+ 890808 0517 2+ 890808 0647 1+ 890808 1529 1- 890808 1918 2 890809 0649 1 890809 1428 2 890810 0531 2 890811 1624 1 890811 2020 1+ 890812 0305 2 890812 0738 1 890812 0800 2+ 890812 0928 2+ 890812 1406 3+ 890813 0627 1- 890813 0720 2+ 890813 1358 2+ 890814 1918 2 890815 1350 3 890815 1505 1+ 890815 1700 1- 890815 1755 2 890815 1858 2+ 890815 2040 2+ 890817 1850 3 890823 2004 1+ 890824 1615 2+ 890829 0430 2+ 890829 0829 2 890829 1258 1 890829 1315 2+ 890829 1519 1+ 890829 1646 1- 890829 1703 1- 890829 1725 2+ 890829 1815 1+ 890830 1635 2 890830 1640 2 890831 1615 1- 890831 1630 1 ******************************************* Importance Summary August 1989 1- events: 8 1 events: 8 1+ events: 8 2 events: 12 2+ events: 19 3 events: 2 3+ events: 1 Total events: 58