AAVSO Sudden Ionospheric Disturbance Report April 2024 Observers: A112 A118 A119 A131 A136 A138 A141 A148 A150 A152 A153 A156 A96 A97 YYMMDD Event Peak Importance 240401 0129 2+ A153 - XRA 240403 1709 2+ A150 - QUAL 240403 1812 2+ A150 - QUAL 240405 1306 1 240405 2025 1- A148 - XRA 240409 2336 1 A153 - XRA 240410 1151 1+ 240410 1248 1- A118 - XRA 240410 1334 1- A118 - XRA 240410 1701 1- A97 - XRA 240410 1736 1+ 240411 0000 3 A96 - QUAL 240411 0958 1+ 240411 1107 2 240411 1356 1 A96 - XRA 240411 1413 2 240411 1620 1- 240411 1703 2 240411 1705 2 240412 1121 2 240412 1347 1 240412 1552 1- 240412 1755 1 240412 2314 1- A153 - XRA 240413 0502 1+ 240413 0715 1 A96 - QUAL 240413 0947 1 A96 - XRA 240413 1245 1 A136 - XRA 240413 1343 1 A118 - QUAL 240413 1403 1 240413 1500 1 240413 2100 2 A156 - XRA 240414 1059 2+ 240414 1150 1- A118 - QUAL 240414 1317 1- 240414 1347 2 240414 1510 1 240414 1629 1+ 240414 1830 1+ 240414 1932 1 240414 1950 1- A153 - XRA 240414 2353 1- A153 - XRA 240415 0006 1 A153 - XRA 240415 0118 1- A153 - XRA 240415 0540 1- A131 - XRA 240415 0711 2+ 240415 0727 2 240415 0842 2 240415 0931 2 240415 1357 1- 240415 1403 1- 240415 1415 2 240415 1640 2 A152 - QUAL 240415 1705 1+ 240415 1911 1 A153 - XRA 240415 1932 1+ 240415 2055 1+ 240415 2147 1 240415 2220 1 A153 - XRA 240415 2355 1- A153 - XRA 240416 1017 1 240416 1535 1- 240416 1615 1- A131 - QUAL 240416 1730 1 240416 1758 1+ 240417 0730 1- 240417 1358 2 A118 - XRA 240417 1549 1- 240417 1648 1- 240417 1817 1- 240417 2010 1 240417 2208 2 240417 2325 1 240418 0609 1 240418 0735 2 240418 1152 1 240418 1629 1+ 240418 1648 1+ 240418 1945 2 240418 1953 2+ 240419 0454 2+ 240419 1121 1 240419 1305 1+ 240419 1313 2+ 240419 1326 2 240419 1505 1- 240419 1533 1- A118 - XRA 240419 1744 1 240419 1912 2 A97 - XRA 240420 0627 1- 240420 0848 1 240420 0917 1- 240420 1153 1 240420 1252 1 A118 - XRA 240420 1307 1- A118 - XRA 240420 1641 1- 240420 1704 1+ 240420 2158 1 240420 2217 2 A148 - QUAL 240421 0000 1+ A141 - QUAL 240421 1217 1- A118 - FLA 240421 1256 2 240421 1514 1+ 240421 1722 1 A118 - FLA 240421 2058 2 A148 - XRA 240421 2152 2 240421 2152 2 240422 0537 1- 240422 0811 2 240422 0910 2+ 240422 1137 1+ 240422 1212 1+ 240422 1331 2+ 240422 1454 1 240422 1519 1+ 240422 1549 1+ 240422 1631 1- 240422 1920 1 A97 - XRA 240422 2006 1- A97 - XRA 240422 2117 1+ 240423 0740 1 240423 0819 2 240423 0952 1+ 240423 1244 1- 240423 1344 2 240423 1533 2+ A118 - FLA 240423 1650 1+ 240423 1743 1+ 240423 1839 2 A150 - FLA 240423 2109 1 240423 2137 1- A148 - XRA 240424 0637 1- 240424 0741 1 240424 0857 1 A118 - FLA 240424 0940 1+ 240424 1036 1+ 240424 1215 2+ 240424 1412 2 240424 1541 1- A152 - XRA 240424 1921 1+ A150 - XRA 240424 2006 2 240424 2302 2+ 240425 1202 1- 240425 1236 1- 240425 1307 1- 240425 1321 2 240425 1432 1 240425 1711 1 240425 1807 1 240426 0636 1- 240426 1937 1 A97 - XRA 240426 2140 1- A97 - XRA 240427 1215 2+ A156 - QUAL 240427 1233 2 240427 1626 1 240427 1928 3+ A97 - QUAL 240427 2137 2 240428 1232 2 240428 1310 1+ 240428 1527 1 240428 1559 1+ 240428 1600 2 240428 2020 1+ 240428 2305 1 240429 0735 1+ 240429 1327 1 240429 1923 1- 240430 1006 1+ 240430 1251 1+ 240430 1508 2 240430 1627 2 240430 1629 2 240430 2347 1 A141 - QUAL ************************************************** Importance Summary - Apr 2024 1- events: 42 1 events: 45 1+ events: 33 2 events: 37 2+ events: 14 3 events: 1 3+ events: 1 ------------------ Total events: 173