AAVSO Sudden Ionospheric Disturbance Report April 1994 Observers: A-09 A-40 A-50 A-59 A-61 A-62 A-63 A-65 A-66 A-67 A-68 A-69 A-70 A-71 A-72 A-73 A-74 A-75 A-76 A-77 A-78 A-80 A-81 A-82 YYMMDD Event Peak (UT) Importance 940402 1215 1 940402 1923 2+ 940409 2204 1- 940410 1230 1- 940410 1636 1- 940413 1744 1 940417 2130 1- 940418 1415 2+ 940420 1530 2 940421 1414 2 940421 1819 1- 940421 1915 1- 940421 2215 1 940422 0547 1- 940422 0530 1- 940423 0951 1- 940423 1910 1- 940426 1930 1- 940428 1648 1- 940428 2205 2+ 940429 0800 1- 940430 1353 1- 940430 1729 1- ******************************************* Importance Summary April 1994 1- events: 15 1 events: 3 1+ events: 0 2 events: 2 2+ events: 3 3 events: 0 3+ events: 0 Total events: 23