AAVSO Sudden Ionospheric Disturbance Report February 2023 Observers: A118 A119 A122 A131 A136 A138 A141 A146 A148 A150 A152 A153 A96 A97 YYMMDD Event Peak Importance 230201 1801 1+ 230201 1801 1+ 230201 2247 1+ 230201 2328 1 A153 - FLA 230203 1645 1+ 230205 1050 1 230206 1211 2 230207 0951 1- A152 - XRA 230207 1322 1 230207 1344 2 230207 1352 2 230207 1718 1+ 230207 1819 1+ 230207 1933 1 230207 2008 2 230207 2128 1- A153 - XRA 230207 2241 1- A153 - QUAL 230207 2257 1- A153 - XRA 230207 2308 2+ A153 - XRA 230207 2326 2+ A138 - QUAL 230208 1032 1+ 230208 1106 1- A152 - QUAL 230208 1127 2 230208 1138 1- A152 - FLA 230208 1226 1- A152 - QUAL 230208 1529 1+ A152 - QUAL 230208 1542 2+ A118 - FLA 230208 1559 2+ 230208 1848 1 230208 2008 2 230208 2107 1+ 230208 2131 3+ A138 - FLA 230209 0718 1- A131 - XRA 230209 0904 2 230209 0915 1- A152 - XRA 230209 1217 2 230209 1222 2+ A96 - XRA 230209 1455 1 230209 1506 3+ A152 - XRA 230209 1524 1 230209 1714 1 230209 1752 1 230209 1827 2 A148 - XRA 230209 1843 2+ 230209 2108 1- A148 - XRA 230210 0805 1- 230210 0852 1- 230210 0906 1- 230210 1028 1- 230210 1050 1- 230210 1437 2 230210 1454 1 230210 1514 2+ A141 - FLA 230210 1514 2+ A141 - FLA 230210 1520 2 A141 - FLA 230210 1555 1+ 230210 1604 2 230210 2236 1- 230211 0755 1- 230211 0807 1 230211 0920 1- 230211 1057 1 230211 1134 1 230211 1208 1- 230211 1222 1- 230211 1240 1+ 230211 1548 1+ 230211 1723 1+ 230212 0847 1 230212 0923 1 230212 1334 1+ 230212 1510 1- 230212 1538 1+ 230212 1555 1 A152 - FLA 230212 1725 1+ 230212 2006 1+ 230213 0705 1- A131 - XRA 230213 1036 1- A131 - XRA 230213 1047 1- A152 - XRA 230213 1304 1- 230213 1322 1- A131 - FLA 230213 1432 1 230213 1538 1- 230213 1554 1- 230213 1818 1- 230213 1914 2+ 230214 0625 1- A131 - XRA 230214 0814 1- 230214 0857 1- 230214 0944 1- 230214 1043 1+ 230214 1121 1 230214 1211 2+ 230214 1218 3 230214 1351 1- A131 - FLA 230214 2123 1+ 230215 0851 1- 230215 0920 1+ 230215 1011 1- 230215 1027 1- 230215 1044 1- 230215 1153 1 230215 1334 1+ 230215 1605 2 230215 1749 2 230215 2000 1 A148 - XRA 230215 2114 1+ 230216 0032 1- A153 - XRA 230216 0644 1- A131 - XRA 230216 0818 2 A131 - QUAL 230216 0847 1- 230216 0905 2+ A131 - QUAL 230216 1047 2+ 230216 1058 2+ 230216 1404 1- A96 - QUAL 230216 1506 1- A131 - QUAL 230216 1927 1- A146 - QUAL 230216 2047 1- A146 - FLA 230216 2105 2+ 230217 1956 2 230217 2006 3 230217 2016 3 230218 0827 1- 230218 0925 1- A118 - FLA 230218 1200 1+ 230218 1837 1 230219 0818 2 230219 1502 1- 230219 1900 1 230219 2103 1 230220 0608 1- A131 - XRA 230220 0641 1- A131 - XRA 230220 1457 1+ 230220 1626 1- 230220 1743 1 230220 1911 1 A153 - XRA 230221 1051 1- 230221 1111 1- 230221 1120 2 230221 1221 1- 230221 1426 1- A131 - XRA 230221 1838 1 230221 1936 1 230221 2014 2 230221 2109 1 230221 2150 1 230222 1028 1- 230222 1236 1 230222 1252 1 230222 1348 2 230223 0614 1- 230223 0812 1- 230223 0845 1+ 230223 0901 2 230223 1212 1+ A141 - FLA 230223 1229 1+ 230223 1234 1+ 230223 1431 1- 230223 1513 1- 230223 1605 1- A131 - QUAL 230223 1819 2 230223 2314 1- A153 - XRA 230224 0705 1+ A131 - XRA 230224 0942 1- A131 - XRA 230224 1130 1 A131 - XRA 230224 1308 1+ 230224 1715 1 230224 2026 2+ 230225 1148 1- 230225 1509 1- 230225 1539 1 230225 1633 3+ A153 - QUAL 230225 1924 2+ 230225 1937 2+ 230226 1159 1 230226 1922 1 230227 1021 1 230227 1021 1 230228 1202 2 A97 - QUAL 230228 1623 1+ 230228 1743 2 230228 1746 2 ************************************************** Importance Summary - Feb 2023 1- events: 65 1 events: 38 1+ events: 31 2 events: 25 2+ events: 17 3 events: 3 3+ events: 3 ------------------ Total events: 182