AAVSO Sudden Ionospheric Disturbance Report September 2023 Observers: A118 A119 A122 A131 A136 A138 A141 A148 A150 A152 A153 A157 A96 A97 YYMMDD Event Peak Importance 230901 2206 2+ A153 - QUAL 230901 2226 2+ 230902 0658 3 230902 0707 3+ 230902 0713 3 230903 0021 2+ 230903 0821 2+ 230903 0834 2+ 230903 1146 1+ 230903 1213 1+ A152 - XRA 230903 1222 2 230903 1232 2+ 230903 1405 1+ 230904 1057 3 230904 1106 2 230904 1410 2 A118 - XRA 230905 0811 2 230905 0936 2 230905 1822 1+ 230905 1945 2 230905 1946 2 230905 2246 1 A141 - QUAL 230905 2246 1 A141 - QUAL 230905 2341 1+ A157 - XRA 230906 0050 3+ A122 - XRA 230906 0757 1 230906 1042 2+ 230906 1326 1 230906 1346 1- 230906 1656 1- A153 - XRA 230906 1758 1+ 230906 1933 1 A153 - XRA 230906 2049 1- 230907 1031 1+ 230907 1147 1+ A118 - XRA 230907 1908 2+ 230908 1118 1- 230908 1352 1 230908 2312 1- 230910 1151 1+ 230910 1331 1- A131 - XRA 230910 2137 1- 230911 0601 1- A131 - XRA 230911 0618 2 A96 - XRA 230911 1036 1+ 230911 1102 1 230911 1127 1+ 230911 1449 2+ 230911 1732 2 230911 2115 1+ 230912 0537 1- A118 - XRA 230912 0701 1+ 230912 0708 2 230912 0806 2+ 230912 1112 1+ 230912 1137 1- A118 - XRA 230912 1522 1+ 230912 1606 2 230912 1614 1- 230912 1636 3+ A157 - QUAL 230912 1938 1 A153 - XRA 230912 2005 2 230912 2159 1+ 230913 0810 2 230914 0748 3 A152 - XRA 230914 1530 2 230914 1845 1+ 230914 1914 1- A97 - XRA 230914 1932 1+ 230914 2126 2 230915 0604 1- A131 - XRA 230915 1317 1- A131 - XRA 230915 1559 1+ A97 - QUAL 230915 2232 2+ 230916 0052 1+ A153 - XRA 230916 0110 2+ A157 - QUAL 230916 1326 1- A131 - XRA 230917 1606 1 A97 - XRA 230918 1041 1 230918 2035 2+ A157 - XRA 230918 2210 1+ 230918 2328 1 A157 - XRA 230919 0059 2+ A122 - QUAL 230919 0400 3 A122 - XRA 230919 0935 2 230919 1050 2 230919 1552 1+ 230919 1730 1+ A97 - XRA 230919 2009 2 230919 2235 1+ 230920 1214 1 A131 - XRA 230920 1418 2 230920 1800 2 230920 1839 1 230921 1253 2 230921 1312 2 A97 - QUAL 230921 1610 1 A97 - XRA 230921 1752 3+ A118 - QUAL 230922 0001 2 A157 - QUAL 230922 0355 2+ A122 - QUAL 230922 0842 1 230922 1143 2 230922 1252 1+ A131 - FLA 230922 1619 2 230922 1636 1+ A131 - XRA 230922 1715 1+ 230922 1931 1+ 230922 2021 2 A157 - XRA 230922 2123 1- A97 - XRA 230922 2300 2 A122 - XRA 230922 2306 2+ A157 - XRA 230923 0713 1+ 230923 0912 2 230923 1012 1- A118 - XRA 230923 1104 1 A118 - XRA 230923 1250 1+ 230923 1315 1 230923 1346 1- A150 - XRA 230923 1457 1- 230923 1517 2 230923 2039 2+ 230924 0314 3+ A122 - XRA 230924 0351 3+ A122 - QUAL 230924 0919 1- 230924 0941 1 230924 1012 1- 230924 1024 1 230924 1152 1- A131 - XRA 230924 1208 1 230924 1500 2 230924 1621 1- A97 - XRA 230924 1724 2+ A97 - XRA 230924 2021 2 230924 2237 2 A148 - XRA 230925 0350 3 A122 - XRA 230925 0812 2 230925 1901 2+ A153 - XRA 230926 0031 3+ A122 - QUAL 230926 1417 1+ 230926 1626 1+ 230927 0948 1 A131 - XRA 230927 1015 1 A131 - XRA 230927 1834 1 230928 0907 2 230928 1233 1+ 230928 1403 1 230929 1827 1+ 230929 2008 1+ 230930 0312 1 A122 - QUAL 230930 1045 1- 230930 1157 1+ 230930 1229 1 230930 1418 1 230930 1443 1+ 230930 1445 1 230930 1606 1 230930 1629 2 230930 1639 1+ 230930 1704 3+ A148 - QUAL 230930 1704 3+ A148 - QUAL 230930 1823 1- 230930 2139 1 ************************************************** Importance Summary - Sep 2023 1- events: 25 1 events: 30 1+ events: 38 2 events: 35 2+ events: 19 3 events: 6 3+ events: 9 ------------------ Total events: 162