AAVSO Sudden Ionospheric Disturbance Report October 1998 Observers: A-40 A-50 A-52 A-62 A-63 A-72 A-80 A-81 A-82 A-84 A-87 A-90 YYMMDD Event Peak (UT) Importance 981007 1045 1- 981007 1249 1+ 981007 1520 1 981007 1542 2 981007 1620 2+ 981007 1715 2+ 981007 1948 1 981008 0840 1 981008 1704 1+ 981009 0745 1+ 981010 0610 1+ 981010 0938 1 981010 1140 1 981010 1317 2 981010 1955 2+ 981011 0746 1- 981014 1716 1+ 981016 2132 2 981017 1849 2+ 981017 2231 2+ 981018 0005 2+ 981018 0146 2 981018 0540 1+ 981019 1228 2 981019 2233 1 981020 0150 1 981020 1428 2 981020 1802 2 981020 2045 2+ 981021 1535 2+ 981021 1828 2+ 981024 0450 1+ 981026 1820 1+ 981028 1324 2 ******************************************* Importance Summary October 1998 1- events: 2 1 events: 7 1+ events: 8 2 events: 8 2+ events: 9 3 events: 0 3+ events: 0 Total events: 34