AAVSO Sudden Ionospheric Disturbance Report August 2017 Observers: A118 A119 A120 A122 A125 A131 A134 A138 A141 A142 A143 A147 A149 A94 A96 A97 YYMMDD Event Peak Importance 170801 0734 1 A122 - XRA 170801 0750 1+ 170814 0213 2+ A122 - XRA 170814 0532 2+ A122 - QUAL 170814 1047 2 170814 1412 1 A131 - XRA 170814 1625 1- 170815 0214 2 170815 0431 2+ A122 - XRA 170818 0853 1- A131 - XRA 170818 1349 1- A131 - XRA 170818 2003 2+ 170818 2105 1 170819 0137 2+ A122 - XRA 170819 0150 2+ A134 - XRA 170819 0418 1- A134 - QUAL 170819 0451 2+ A122 - XRA 170819 0907 1 170819 1105 2 170819 1216 2+ 170819 1457 1+ 170819 1549 1- 170819 2158 2 170820 0153 3 170820 0430 2 170820 0750 1+ 170820 1446 1 A131 - XRA 170820 1928 1+ 170820 1938 2 170821 0316 2+ A122 - XRA 170821 1757 2+ 170821 2025 2 A138 - XRA 170821 2238 1- A122 - XRA 170822 0710 2+ A122 - XRA 170822 1116 1- A96 - XRA 170822 1950 1 A138 - XRA 170823 0630 3+ 170823 0650 2 170823 1342 2+ 170823 1800 2+ 170823 1927 2+ 170824 0037 3 A122 - XRA 170825 0729 2+ 170825 0734 2 170827 1517 1 170827 1523 1+ 170828 1331 3+ A125 - QUAL 170829 0300 2+ A122 - XRA 170830 0837 1+ A131 - XRA 170830 1110 2+ A119 - XRA 170830 1428 2+ A125 - QUAL 170830 1847 2 170830 2251 2+ A125 - QUAL ************************************************** Importance Summary - Aug 2017 1- events: 7 1 events: 7 1+ events: 6 2 events: 10 2+ events: 19 3 events: 2 3+ events: 2 ------------------ Total events: 53