AAVSO Sudden Ionospheric Disturbance Report April 2023 Observers: A118 A119 A122 A131 A136 A138 A141 A146 A148 A150 A152 A153 A96 A97 YYMMDD Event Peak Importance 230405 1213 2 A152 - XRA 230405 1751 1- 230406 0548 1+ 230406 0619 1- A96 - QUAL 230406 0646 3 230406 1357 1 230407 1639 1- A97 - XRA 230407 2021 1- A153 - XRA 230407 2041 1 A153 - XRA 230407 2334 1 230408 0143 1+ A153 - XRA 230408 1120 1- 230408 1845 1 230408 1942 1 A153 - XRA 230409 0607 1+ 230409 0738 1+ A131 - XRA 230409 1454 1 230409 1622 1+ 230409 1633 1- 230409 1825 1 230409 1849 1 A148 - XRA 230409 1921 1- 230409 2043 1 A153 - XRA 230409 2111 1 230409 2129 1 A153 - XRA 230410 0518 1+ 230410 0945 1- 230410 1130 1 A118 - XRA 230410 1338 1- A153 - XRA 230410 1345 1- A141 - XRA 230410 1351 1+ 230410 1449 1- A153 - XRA 230410 1546 1- 230410 1737 1 230410 1854 1- A153 - XRA 230410 1940 1- A97 - XRA 230410 2027 3+ A122 - FLA 230410 2233 1- A153 - XRA 230410 2319 1- A153 - XRA 230410 2358 1- A153 - QUAL 230411 0015 2+ A122 - QUAL 230411 0159 1+ A122 - XRA 230411 0447 1+ A122 - QUAL 230411 1017 2 230411 1440 1- 230411 2242 1+ 230412 0843 1 230412 1153 1+ 230412 1159 2 A96 - XRA 230412 1537 1 A141 - XRA 230412 1544 1- 230412 1545 1- A146 - XRA 230412 2230 1- A153 - XRA 230412 2300 2+ A122 - XRA 230412 2335 1 230413 0034 2 A122 - FLA 230413 0801 1- 230413 0821 1 230413 1001 1- A131 - FLA 230413 1044 2 230413 1157 1- 230413 1441 1- A131 - QUAL 230414 0427 3+ A122 - QUAL 230414 1053 1 230414 1256 1+ 230414 1322 1 230414 1344 1- A152 - XRA 230414 1616 1+ 230414 1656 1 230414 1859 1 A153 - XRA 230414 1906 1+ A97 - XRA 230414 1927 1+ 230414 1956 1 230414 2047 1 230414 2305 2 A122 - FLA 230414 2328 1+ 230415 0527 1- A131 - XRA 230415 0645 2 A131 - XRA 230415 0852 1 230415 0915 1+ 230415 0956 1- 230415 1617 1- A153 - XRA 230415 1723 1+ 230415 2115 2 A153 - XRA 230416 1739 1+ 230416 1953 1+ A153 - XRA 230417 0506 3+ A122 - QUAL 230417 0635 1+ 230417 0744 1+ A131 - XRA 230417 0838 1+ A131 - XRA 230417 1424 1 230417 1432 1+ 230418 1435 1 230418 1528 1 230418 1817 1+ 230418 1918 1- 230418 2256 1+ A153 - XRA 230419 0837 2+ 230419 1112 2 230419 2348 2+ A122 - XRA 230420 0744 1 A131 - XRA 230420 0923 1+ 230420 1057 1 230420 1223 1 230420 1620 1 230420 2231 1- A153 - XRA 230420 2327 2+ A122 - XRA 230421 1808 2 230421 2226 1+ 230422 0148 2+ A122 - XRA 230422 1601 1- 230423 0641 1- A118 - XRA 230423 2058 2 230424 1117 1- 230424 1306 1- 230426 1423 1 230427 0000 1+ A152 - FLA 230427 1114 2 230427 1615 1+ A152 - XRA 230427 1713 1+ 230428 1214 1 A146 - FLA 230428 1342 1- A146 - QUAL 230428 1436 1- A146 - QUAL 230428 1557 2 230428 1744 3 A141 - XRA 230428 1818 1 230428 1922 1+ 230428 2137 2+ A138 - XRA 230429 0840 1 230429 1015 2 230429 1058 2+ A118 - FLA 230429 1252 1- 230429 1327 1 230429 1400 2+ 230429 1407 2+ 230429 1453 3 A141 - QUAL 230429 1539 1- A146 - QUAL 230429 1612 1- A146 - QUAL 230429 1624 1+ A131 - QUAL 230429 1923 2+ 230430 0848 2 230430 1443 1+ 230430 1446 1+ 230430 2014 2+ 230430 2024 2+ 230430 2024 2+ 230430 2140 1 ************************************************** Importance Summary - Apr 2023 1- events: 40 1 events: 37 1+ events: 35 2 events: 15 2+ events: 14 3 events: 3 3+ events: 3 ------------------ Total events: 147