AAVSO Sudden Ionospheric Disturbance Report July 2025 Observers: A118 A119 A131 A136 A141 A148 A150 A152 A153 A154 A96 A97 YYMMDD Event Peak Importance 250705 2131 1 A148 - XRA 250706 1856 1- A97 - XRA 250707 2110 1+ 250708 0424 2+ A131 - XRA 250709 0429 2+ A131 - XRA 250710 0644 1+ 250710 1156 2+ 250710 1203 2+ 250710 1212 2+ 250710 1328 1+ 250710 1711 1 250710 1810 1- A97 - XRA 250710 1937 1 A141 - XRA 250710 1937 1 A141 - XRA 250710 1954 1 A148 - QUAL 250711 1003 2 A150 - XRA 250711 1249 1 A150 - FLA 250711 1250 1+ A150 - FLA 250711 1422 1+ 250711 1429 1+ A148 - XRA 250711 1514 1+ 250711 1523 2+ A153 - XRA 250711 1617 1 A153 - FLA 250711 1709 1 250711 1811 2+ A153 - FLA 250712 0658 3+ A154 - XRA 250712 0822 1 250712 0836 2 250712 1208 2 250712 1242 1- A148 - XRA 250712 1302 3+ A148 - XRA 250712 1410 3 A150 - XRA 250712 1422 1- A97 - XRA 250712 1455 2 250712 1505 2 250712 1547 3+ A148 - QUAL 250712 1831 2 250712 1914 3+ A148 - QUAL 250712 2203 1 250712 2239 3+ A148 - QUAL 250713 0556 3+ A154 - XRA 250713 1809 1- 250713 2151 1+ 250714 0501 1- A131 - XRA 250714 0937 1- A131 - XRA 250714 1511 1- A148 - XRA 250714 1703 2 250714 1804 2+ A153 - FLA 250715 1708 1 A97 - XRA 250717 0928 1+ 250717 1314 1- 250717 1954 1- A97 - XRA 250718 0812 1+ 250718 1312 1 A131 - XRA 250718 1640 1 250719 2226 2 A148 - XRA 250719 2310 2 250720 0742 2 250720 1154 1 250720 1455 1- 250720 1537 1+ 250720 1538 1+ 250722 0807 1 250722 1011 1 250722 1629 1- 250722 1729 1- 250722 2013 1- 250722 2113 2+ A153 - XRA 250723 1337 1- 250723 1506 1 A148 - QUAL 250724 0547 3 250724 1056 2 A118 - XRA 250724 1640 1- A97 - XRA 250725 2036 1 A148 - QUAL 250725 2325 1- A148 - QUAL 250726 1425 1+ 250726 1445 1+ A148 - QUAL 250726 1925 2 A148 - QUAL 250727 0913 1 250727 1319 1- 250727 1426 1- 250727 1751 1- A148 - QUAL 250727 1845 1 250729 2205 1- 250729 2205 1- 250730 0617 1- 250730 1032 1+ 250730 1130 1- 250730 1305 1 A118 - QUAL 250730 1305 1 A118 - QUAL 250730 1942 1+ A97 - XRA ************************************************** Importance Summary - Jul 2025 1- events: 24 1 events: 22 1+ events: 16 2 events: 12 2+ events: 9 3 events: 2 3+ events: 6 ------------------ Total events: 91