AAVSO Sudden Ionospheric Disturbance Report May 2022 Observers: A118 A119 A120 A122 A126 A131 A134 A136 A138 A141 A148 A150 A152 A153 A155 A96 A97 YYMMDD Event Peak Importance 220501 0816 1- 220501 1113 2 220501 1118 2 220501 1327 1 220501 1338 1+ A152 - XRA 220501 1822 1+ 220502 1916 2 A153 - XRA 220503 0132 2+ A120 - XRA 220503 0138 1- A122 - XRA 220503 0446 2+ A120 - XRA 220503 0751 2 220503 1203 1 220503 1324 2 220503 1327 2 220503 2121 3 A153 - XRA 220504 0000 2 A141 - QUAL 220504 0000 2 A141 - QUAL 220504 0018 3 A153 - XRA 220504 0552 1 220504 0824 1 220504 0857 2+ 220504 0859 2+ 220504 1020 1 220504 1207 1 220504 1256 1+ 220504 1630 2 220504 1830 1+ 220504 1906 1+ 220504 1948 1 220504 2024 2+ 220504 2259 2 A153 - XRA 220505 0412 1- A120 - XRA 220505 0440 2 A120 - XRA 220505 0712 1- 220505 0720 1+ 220505 0836 1- 220505 0901 2 220505 1001 1- A131 - XRA 220505 1119 1 220505 1155 2 220505 1202 2 220505 1251 1- A97 - XRA 220505 1315 1+ 220505 1338 1 220505 1410 2 220505 1540 1 220506 0413 2 A120 - QUAL 220506 1519 1- 220506 1622 1+ 220506 1656 1- A126 - QUAL 220507 0606 1- 220507 0806 1- A118 - QUAL 220507 0840 1- A126 - QUAL 220507 1510 1- 220508 0748 1 220508 1231 1+ 220508 1632 3 A153 - QUAL 220508 1938 1+ 220509 1431 1+ 220509 1803 3+ A153 - XRA 220510 0755 1 220510 1003 1 220510 1040 2 220510 1157 1 A97 - XRA 220510 1259 1 220510 1337 1- 220510 1355 2 220510 1403 2+ A138 - XRA 220510 2134 2+ A153 - QUAL 220511 0253 2+ 220511 0541 1- A131 - XRA 220511 0553 1- A131 - XRA 220511 0616 1- 220511 0626 1- 220511 0951 2 220511 1205 1 220511 1247 1+ 220511 1326 1+ 220511 1406 1- 220511 1423 1 220511 1452 1+ 220511 1534 1- A96 - XRA 220511 1544 2 220511 1648 2 220511 1845 3 220511 2101 2+ A153 - QUAL 220512 0139 2+ A134 - QUAL 220512 0219 2+ A120 - XRA 220512 0536 1 A131 - XRA 220512 0615 1+ A131 - XRA 220512 0745 1+ 220512 0958 1 A131 - FLA 220512 1040 2 220512 1153 1- 220512 1809 1 220512 2018 2 220513 0859 1+ 220513 1010 1 220513 1358 1 A97 - XRA 220514 0738 1 A136 - XRA 220514 0920 2 220514 1245 1 A97 - QUAL 220514 1413 1 A97 - XRA 220514 1627 1+ A97 - XRA 220514 1930 1+ 220514 2015 2+ A153 - XRA 220514 2133 1 A153 - QUAL 220514 2208 1 A153 - XRA 220515 0006 1+ 220516 1013 1+ 220516 1322 2 220516 1333 2+ 220516 1855 1- A153 - QUAL 220516 2314 1- A122 - XRA 220517 0010 2+ A122 - XRA 220517 0450 1 A120 - QUAL 220517 0507 2+ A122 - XRA 220517 0700 1 A131 - XRA 220517 1028 1+ 220517 1036 2 220517 1141 2 220517 1236 1+ 220517 1627 1+ 220517 1935 3+ A153 - XRA 220518 0824 1 A118 - XRA 220518 1009 1 220518 1042 2 220518 1549 1+ 220518 1645 2 A153 - FLA 220518 2142 1- A97 - XRA 220518 2201 1 220519 0233 1 A120 - QUAL 220519 0529 2 A120 - QUAL 220519 0551 1 220519 0640 1 220519 0715 2+ 220519 0925 1 220519 1009 1+ 220519 1103 1- A152 - FLA 220519 1459 1- A126 - FLA 220519 1516 2 220519 1517 1+ 220520 0745 2+ 220520 0750 2+ 220520 1217 1- A152 - XRA 220520 1710 1+ A97 - FLA 220520 1852 2 A97 - XRA 220520 1959 1+ A97 - QUAL 220520 2212 1- 220520 2339 1 A153 - XRA 220521 1335 1- A152 - XRA 220521 1540 1 A97 - XRA 220522 1428 2 220522 1543 1- 220522 2212 1 A131 - XRA 220522 2304 3 A122 - QUAL 220523 0848 1- 220523 1106 1+ 220524 0907 1- 220524 0924 1+ 220524 1204 1+ 220524 2219 1 220525 1822 2+ 220525 1827 2+ 220526 0451 2+ A134 - XRA 220526 1321 1+ A119 - XRA 220528 0029 3 A153 - QUAL 220528 0029 3 A153 - QUAL 220528 0646 1- A118 - XRA 220528 0646 1- A118 - XRA ************************************************** Importance Summary - May 2022 1- events: 34 1 events: 40 1+ events: 33 2 events: 33 2+ events: 21 3 events: 7 3+ events: 2 ------------------ Total events: 170