AAVSO Sudden Ionospheric Disturbance Report November 1987 Observers: A-01 A-09 A-19 A-26 A-46 A-49 A-50 A-52 A-59 YYMMDD Event Peak (UT) Importance 871101 1723 1 871101 1938 1 871102 1356 1+ 871102 1810 1- 871103 0930 2+ 871104 1715 2 871105 0510 2+ 871105 1018 2+ 871106 2043 2 871112 1639 1 871112 1751 1- 871113 1913 2 871119 0745 2+ 871119 1500 2 871119 1615 1- 871120 0442 2+ 871121 1802 2+ 871126 0317 1+ 871129 1615 2+ ******************************************* Importance Summary November 1987 1- events: 3 1 events: 3 1+ events: 2 2 events: 4 2+ events: 7 3 events: 0 3+ events: 0 Total events: 19