AAVSO Sudden Ionospheric Disturbance Report May 2015 Observers: A118 A119 A120 A122 A125 A131 A134 A136 A141 A143 A146 A94 A96 A97 YYMMDD Event Peak Importance 150501 0300 1 A134 - XRA 150503 0041 1- A141 - QUAL 150503 0605 1+ 150503 0932 1 A118 - XRA 150503 2319 2 A141 - FLA 150504 0850 2 150504 1031 2 150504 1705 2 150504 1713 1- A125 - XRA 150505 0235 1- A134 - XRA 150505 0330 3+ A122 - XRA 150505 0403 2 150505 0445 1- A134 - XRA 150505 0507 1- 150505 0714 2 150505 0802 1- 150505 0825 1- 150505 0837 1+ 150505 0918 1+ 150505 0947 1+ 150505 1003 2+ 150505 1128 2 150505 1141 2 150505 1201 1- A143 - XRA 150505 1220 1- A143 - QUAL 150505 1242 1- A143 - QUAL 150505 1328 1- A119 - QUAL 150505 1352 2 150505 1400 2 150505 1424 2 150505 1436 2+ 150505 1522 1+ A119 - FLA 150505 1636 1 150505 1724 2 150505 2211 2+ 150506 0029 1 A122 - QUAL 150506 0510 1- 150506 0641 1 150506 0651 1- 150506 1024 1+ A131 - QUAL 150506 1111 2 150506 1119 1+ 150506 1149 2 150506 1158 2+ 150506 1248 1- A131 - FLA 150506 1718 1- 150506 2019 2 A141 - XRA 150506 2026 2 A141 - XRA 150506 2216 1+ A94 - QUAL 150507 0435 2 A131 - XRA 150507 0630 1 150507 1001 2 150507 1529 2 150507 1655 1 150507 1957 1 150507 2315 1 A122 - XRA 150508 0409 1+ A122 - XRA 150508 0415 2 A120 - XRA 150508 0940 1 150508 1547 1- 150508 2150 1+ 150509 0137 2+ 150509 0811 2 150509 1400 1- 150510 0826 1+ A131 - XRA 150510 1258 2 150510 1303 2+ 150510 1710 1- 150511 1309 1+ A131 - XRA 150511 1846 1- 150512 1046 1- 150512 1151 2 150513 0601 1 150513 0949 2 150513 1000 2+ 150513 1113 2 150513 1816 2 150514 0732 2 150514 1407 2 150514 1625 1+ 150514 1753 1+ 150515 0011 2 A122 - QUAL 150519 1058 1 A146 - XRA 150519 1158 1- 150519 1312 1- A146 - FLA 150520 0812 1+ 150520 1704 1- A146 - XRA 150520 1823 1- A146 - XRA 150521 0704 1- A141 - XRA 150521 0704 1- A141 - XRA 150523 1720 2+ A146 - FLA 150523 1739 1 150526 1143 1- A141 - XRA 150526 1143 1- A141 - XRA 150528 0903 2+ A120 - QUAL 150528 1005 2 A120 - QUAL ************************************************** Importance Summary - May 2015 1- events: 28 1 events: 13 1+ events: 15 2 events: 30 2+ events: 9 3 events: 0 3+ events: 1 ------------------ Total events: 96