AAVSO Sudden Ionospheric Disturbance Report October 2025 Observers: A119 A131 A138 A141 A148 A150 A153 A154 A96 YYMMDD Event Peak Importance 251101 1043 2+ A131 - QUAL 251101 1136 2 251101 1229 1+ A131 - QUAL 251101 1642 2 251101 1648 1+ 251102 1245 2 A150 - QUAL 251102 1405 2+ A150 - XRA 251102 1531 2+ A150 - QUAL 251102 1704 2 A150 - XRA 251103 0611 2 A96 - XRA 251103 1123 2+ A150 - QUAL 251103 1238 2 251103 1301 1 A131 - QUAL 251103 1437 2 251103 1538 3 A150 - XRA 251103 1712 2 251103 1719 2 251103 2123 1+ A148 - XRA 251104 1848 1- A148 - XRA 251107 1130 2 251107 2011 1+ 251109 1131 2+ A150 - QUAL 251109 1224 1- A96 - XRA 251109 1231 2+ 251109 1232 3+ A154 - XRA 251109 1541 3 A150 - QUAL 251109 1719 2+ A150 - QUAL 251110 2017 1+ A148 - XRA 251111 1917 1+ 251112 1335 2+ A141 - XRA 251112 1342 2+ 251112 1400 2+ A148 - XRA 251112 2135 1+ A148 - XRA 251113 0751 1+ A131 - XRA 251113 0920 2+ 251113 1047 2+ 251113 1317 2+ 251113 1542 1- A148 - XRA 251113 1607 1- A148 - XRA 251113 1650 1+ 251113 1815 1 A148 - XRA 251113 1859 2 251113 1908 2 251114 0000 2+ A141 - XRA 251114 1249 2 251114 1321 2 A131 - XRA 251114 1536 2 251114 1641 1- A148 - XRA 251114 1753 1 251114 1943 2 251114 2034 2 251114 2143 1+ 251115 0718 2 251115 0951 1- A96 - XRA 251115 1022 1- A96 - XRA 251115 1224 1+ A96 - XRA 251115 1410 2 251115 1808 1 251115 1939 2 A148 - XRA 251115 2213 2+ 251116 0803 1 A131 - XRA 251116 1003 2+ 251116 1202 2+ 251116 1309 1- 251116 1354 1+ 251116 1407 2 251116 1608 1+ 251116 1729 2+ A150 - QUAL 251116 1916 2 251116 2043 1 251116 2319 2 A138 - XRA 251117 1020 1- A96 - XRA 251117 1209 1 A131 - XRA 251117 1223 1- A96 - QUAL 251117 1243 1 251117 1432 1+ 251117 1624 2 251117 1700 1+ A153 - XRA 251117 1903 2 251118 0657 1 A96 - XRA 251118 0747 1 A96 - XRA 251118 1053 2+ 251118 1745 2 A148 - XRA 251118 2159 2 251119 0804 2 A96 - XRA 251119 1245 2+ A96 - XRA 251119 1827 1+ A148 - XRA 251119 2014 2 251120 0748 1+ A96 - XRA 251131 1654 1+ 251131 1654 1+ 251131 2014 3 251131 2031 2+ 251131 2130 3+ A148 - QUAL ************************************************** Importance Summary - Oct 2025 1- events: 10 1 events: 10 1+ events: 19 2 events: 29 2+ events: 21 3 events: 3 3+ events: 2 ------------------ Total events: 94