AAVSO Sudden Ionospheric Disturbance Report December 2011 Observers: A112 A118 A119 A120 A121 A122 A124 A125 A129 A94 A96 A97 YYMMDD Event Peak Importance 111201 1048 1+ A129 - XRA 111204 1356 3+ A118 - QUAL 111204 1611 2+ 111204 1956 1- A122 - XRA 111205 1346 1+ 111205 1518 2+ 111205 1909 1- 111205 2330 2+ A122 - XRA 111207 0927 2 A112 - XRA 111207 2015 1 A122 - QUAL 111208 0017 1- A122 - XRA 111209 1320 2 111210 0004 1- A122 - XRA 111210 1821 1+ A124 - QUAL 111212 1339 1- A96 - XRA 111212 2058 1- A122 - QUAL 111213 0801 1- A96 - XRA 111214 0919 1- 111214 1326 1+ 111214 1458 2 111214 1647 1- A94 - XRA 111214 1945 2 111214 2231 2+ A122 - QUAL 111216 0008 1- A122 - QUAL 111216 1850 1 A124 - QUAL 111217 2308 1- A122 - XRA 111218 0130 1- A122 - XRA 111218 0502 1- A122 - XRA 111218 0747 1- A96 - XRA 111220 1119 1- A122 - QUAL 111220 1152 3+ A118 - XRA 111220 1816 1- A125 - XRA 111220 2038 2 A125 - XRA 111220 2157 1- A122 - XRA 111220 2250 1+ A122 - XRA 111221 0316 1+ A122 - XRA 111221 0459 1 A122 - XRA 111221 0736 1- A122 - XRA 111221 1038 2 111221 1105 1+ 111221 1306 1+ 111221 1909 1+ 111222 0207 2+ A122 - XRA 111223 0009 1- A122 - QUAL 111223 1014 1- A96 - XRA 111223 1920 2 A121 - XRA 111224 0840 1 A122 - XRA 111224 1919 1+ 111225 0417 1 A122 - QUAL 111225 0850 1 A112 - XRA 111225 0856 1- A96 - XRA 111225 1117 1- A129 - XRA 111225 1126 2+ 111225 1705 1 A121 - XRA 111225 1817 2+ 111225 2031 2 111226 0223 2 A122 - XRA 111226 0947 1+ 111226 1138 3+ 111226 1145 3 111226 2027 1 111226 2050 2+ A121 - QUAL 111226 2332 1- A124 - FLA 111227 0420 3 A122 - XRA 111227 0924 1- 111227 1206 2+ 111227 1218 1+ A97 - XRA 111227 1730 2+ A121 - XRA 111228 1140 3+ A118 - XRA 111228 1154 1 A96 - XRA 111228 1311 1 A96 - XRA 111228 1424 1+ 111228 1610 3+ A118 - XRA 111228 1640 2+ 111228 2032 1+ 111228 2130 1 111229 0323 2 A120 - XRA 111229 0634 2 A120 - XRA 111229 1349 2 111229 1730 2+ A121 - XRA 111229 1925 2+ A121 - XRA 111229 2035 1 A121 - XRA 111229 2107 2+ 111229 2152 1- 111230 1032 2+ 111230 1342 2+ 111230 1824 1 A94 - XRA 111230 2022 1- A94 - XRA 111230 2031 2 A124 - XRA 111230 2117 2 A124 - XRA 111231 1314 2+ 111231 1625 2 ************************************************** Importance Summary - Dec 2011 1- events: 26 1 events: 13 1+ events: 14 2 events: 15 2+ events: 17 3 events: 2 3+ events: 5 ------------------ Total events: 92