AAVSO Sudden Ionospheric Disturbance Re port November 90 Observers: A-01 A-09 A-19 A-40 A-50 A-52 A-59 A-61 A-62 A-63 A-64 A-65 A-66 A-67 A-68 A-69 A-70 A-71 YYMMDD Event Peak (UT) Importance 901104 1740 2+ 901105 1303 1- 901105 1455 1 901105 1555 1+ 901105 1730 1- 901106 1011 1+ 901106 1759 1 901106 1903 1 901106 2047 2 901107 1306 1 901107 1755 2 901107 1852 1 901107 2008 1 901108 0829 1- 901108 0908 1+ 901108 1514 2+ 901108 1959 1 901111 0443 2+ 901111 1431 1 901112 1436 1 901112 1645 1- 901112 1901 1- 901112 1919 1+ 901113 1131 2+ 901114 1729 1+ 901115 0919 1 901115 1123 1 901115 1515 2 901115 2120 1 901116 0819 1- 901116 1317 1- 901116 1810 1 901116 1937 1 901117 0542 1+ 901117 0702 2 901117 0909 1 901117 1314 1 901117 1448 1 901117 1601 1- 901117 1736 2 901117 1844 2 901117 1942 2 901118 0021 1 901118 0852 1- 901118 1442 1 901118 1527 1 901118 1636 1- 901118 1808 2+ 901118 1953 1 901119 0931 1 901119 0951 2 901119 1113 1- 901119 1338 2+ 901120 1722 1 901120 1748 1+ 901120 1826 1 901120 1848 2 901121 0504 1 901121 0534 2+ 901121 0630 2+ 901121 1728 2 901121 1843 1 901121 1918 1+ 901122 0826 1+ 901122 1422 2 901123 0907 2 901123 1636 1 901123 2100 1+ 901124 1421 2+ 901124 1815 1- 901124 1832 1+ 901124 2001 1+ 901125 0816 1+ 901125 1017 2+ 901125 1712 2+ 901125 1900 2+ 901126 0940 2 901126 1450 1 901126 1654 2 901126 2041 1- 901127 0519 2 901127 1558 1+ 901127 1828 2 901127 1905 1 901127 1946 1+ 901128 0626 2+ 901128 1412 2 901128 1950 1+ 901129 0953 1+ 901129 1341 2+ 901130 0552 1+ 901130 1758 1 ******************************************* Importance Summary November 90 1- events: 13 1 events: 30 1+ events: 18 2 events: 17 2+ events: 14 3 events: 0 3+ events: 0 Total events: 92