AAVSO Sudden Ionospheric Disturbance Report July 1989 Observers: A-01 A-03 A-09 A-19 A-50 A-52 A-59 A-61 A-62 A-63 A-64 YYMMDD Event Peak (UT) Importance 890702 1418 1+ 890703 1503 1 890704 0530 2+ 890704 1451 1 890704 1730 1+ 890704 1954 1 890705 0800 2 890705 1243 1 890705 1518 2 890705 1600 1 890705 1653 2 890705 1826 1 890709 0127 2+ 890716 1410 2 890719 1411 1 890719 1613 1 890719 2129 1+ 890720 1659 1+ 890720 2030 2+ 890721 0531 1 890721 0548 2 890721 1251 1 890721 1626 2 890721 2009 1+ 890722 0606 1- 890722 1847 1- 890723 0648 1+ 890723 2133 1- 890725 0844 2+ 890725 1706 2 890726 0515 2+ 890727 1630 2 890729 0615 1- 890729 0707 2 890729 1507 2+ 890731 1800 1 890731 2100 2 890731 2320 2 ******************************************* Importance Summary July 1989 1- events: 4 1 events: 11 1+ events: 6 2 events: 11 2+ events: 6 3 events: 0 3+ events: 0 Total events: 38