AAVSO Sudden Ionospheric Disturbance Report September 2017 Observers: A118 A119 A120 A122 A125 A131 A134 A138 A142 A143 A147 A149 A94 A97 YYMMDD Event Peak Importance 170901 1538 1 170902 0304 3 A122 - XRA 170902 1540 2+ 170902 1548 2+ A147 - XRA 170903 0955 2+ 170904 0552 2+ A131 - XRA 170904 0822 1+ A143 - XRA 170904 1004 2 A143 - FLA 170904 1046 2 A143 - FLA 170904 1141 1 A143 - XRA 170904 1225 1 170904 1315 2 A143 - QUAL 170904 1352 1- A125 - QUAL 170904 1409 1 A125 - FLA 170904 1415 1+ A143 - FLA 170904 1449 1 A125 - QUAL 170904 1517 1- 170904 1531 2 170904 1622 1- A125 - FLA 170904 1646 1+ 170904 1739 1+ 170904 1745 2 170904 1823 1+ 170904 1936 1+ 170904 2003 1- 170904 2036 1+ 170904 2218 2 170905 0035 2+ A122 - XRA 170905 0108 2+ A122 - XRA 170905 0351 3 A122 - XRA 170905 0641 2+ 170905 0726 1+ A143 - QUAL 170905 0818 2+ A143 - QUAL 170905 0931 2+ A143 - QUAL 170905 1019 2+ 170905 1217 2+ A143 - FLA 170905 1306 2+ A149 - QUAL 170905 1334 2+ 170905 1618 2 170905 1715 1 A97 - XRA 170905 1741 1+ 170906 0734 2 170906 0742 2 170906 0910 3 170906 1111 2 A143 - QUAL 170906 1159 2+ 170906 1444 1+ 170906 1555 1+ 170906 1652 1- A125 - QUAL 170906 1932 2+ 170906 2339 2+ A122 - QUAL 170907 0020 1- A125 - QUAL 170907 0034 1+ A125 - QUAL 170907 0121 2+ A125 - QUAL 170907 0139 1- A125 - QUAL 170907 0503 2 170907 0629 2+ 170907 0737 2 170907 0922 1- 170907 0955 1 170907 1017 2 170907 1033 3+ A118 - QUAL 170907 1218 2+ A143 - XRA 170907 1435 3 170907 1718 1 A125 - QUAL 170907 1811 1+ 170907 1827 1- A97 - XRA 170907 1845 1 A125 - XRA 170907 1919 2 A125 - QUAL 170907 1955 1 A125 - QUAL 170907 2018 2 A125 - QUAL 170907 2058 3+ A125 - XRA 170907 2121 2+ A138 - QUAL 170907 2143 2+ A125 - XRA 170907 2317 1+ A125 - FLA 170907 2346 1 170908 0143 2 170908 0231 2+ A134 - XRA 170908 0342 2 A134 - XRA 170908 0404 2+ A122 - QUAL 170908 0543 2 170908 0710 1+ 170908 0748 2+ 170908 0758 3 170908 0940 1+ A131 - XRA 170908 1049 1- 170908 1127 2 170908 1136 1 A125 - XRA 170908 1215 1+ 170908 1251 1- 170908 1313 1- A125 - QUAL 170908 1329 1+ A125 - QUAL 170908 1418 1- A125 - QUAL 170908 1441 1+ 170908 1520 3 170908 1545 3 170908 1555 3 A147 - XRA 170908 1812 3+ A125 - XRA 170908 1833 1 A97 - XRA 170908 2130 2+ A138 - QUAL 170908 2341 2 170909 0308 2 170909 0324 3 A134 - XRA 170909 0401 1- A134 - XRA 170909 0629 1 170909 0657 1- 170909 0735 2 170909 1102 2 170909 1119 3+ 170909 1453 1- 170909 1631 1 A125 - XRA 170909 1916 1- A97 - XRA 170909 2115 2+ 170909 2307 2+ 170909 2358 2 A125 - QUAL 170910 0258 3 A134 - XRA 170910 0921 2+ 170910 1052 3+ A118 - QUAL 170910 1052 3+ A118 - QUAL 170910 1258 2 170910 1422 1- 170910 1526 1- A125 - XRA 170910 1554 3 170910 1603 3 170910 1638 3 170910 1943 3 A125 - QUAL 170910 2053 1+ A134 - QUAL 170911 1303 1 A125 - QUAL 170911 1420 2+ A125 - QUAL 170911 1554 3+ A125 - QUAL 170911 2021 2+ A125 - QUAL 170911 2155 2+ A125 - QUAL 170912 0728 1+ 170912 2155 2+ A125 - QUAL 170912 2305 2+ A125 - QUAL 170914 1603 3+ A125 - QUAL 170914 2102 2+ A125 - QUAL 170915 1939 1 A125 - QUAL 170916 2009 2+ A125 - QUAL 170916 2058 2+ A125 - QUAL 170917 1911 1 A125 - QUAL 170917 1952 3 A125 - QUAL 170918 1452 2 A125 - QUAL 170926 0234 2+ 170927 0101 2 A122 - XRA 170927 1634 2+ A125 - QUAL 170927 1743 2+ A125 - XRA 170928 1933 3 A125 - QUAL 170928 2145 1+ A125 - QUAL ************************************************** Importance Summary - Sep 2017 1- events: 19 1 events: 18 1+ events: 22 2 events: 27 2+ events: 39 3 events: 16 3+ events: 8 ------------------ Total events: 149