AAVSO Sudden Ionospheric Disturbance Report February 2012 Observers: A102 A115 A118 A119 A120 A121 A122 A124 A125 A129 A130 A131 A80 A94 A96 A97 YYMMDD Event Peak Importance 120201 1202 1+ A129 - QUAL 120202 1150 1- A130 - XRA 120202 1151 1- A130 - XRA 120205 1232 1- A130 - XRA 120205 1310 1- 120205 1314 1- 120205 1322 1- 120205 1323 1- 120205 1415 1- 120205 1519 1- 120205 1623 1- 120205 1715 1- 120205 2149 1- 120205 2226 1- 120205 2227 1- 120206 0727 1- A122 - XRA 120206 1308 1- A130 - XRA 120206 1719 1- A130 - XRA 120206 1730 2 A121 - XRA 120206 2000 2 120206 2027 2+ A124 - QUAL 120207 0227 2+ A120 - XRA 120207 0244 1- A122 - XRA 120207 1104 2 120207 1734 2 120208 2205 2 A121 - XRA 120208 2240 2+ A124 - QUAL 120209 0935 1+ A80 - XRA 120210 1209 1- 120210 1535 2 A80 - XRA 120211 0855 1- 120211 1003 2 120211 1045 1- 120211 1605 1 120211 1611 1- 120211 1857 1 120211 2044 1+ 120212 0447 1+ A102 - XRA 120212 0701 2 A102 - XRA 120212 0741 1 A102 - XRA 120212 1443 1 120212 1850 2 A121 - XRA 120215 1358 1 A129 - QUAL 120215 2225 1- 120216 2246 1- 120216 2249 1- 120218 1309 1- A130 - XRA 120218 1313 1- A130 - XRA 120219 0850 1 A80 - XRA 120219 1735 1- 120219 1854 1- 120219 1911 1- A130 - XRA 120219 1914 1- A130 - XRA 120219 1940 1- A130 - XRA 120219 1943 1- A130 - XRA 120219 2011 1- 120220 1123 1- 120220 1131 1+ 120220 2213 1- 120220 2350 1- A130 - XRA 120221 1148 2 120221 2051 1- A130 - XRA 120221 2053 1- A130 - XRA 120221 2159 1- 120222 1409 1- 120222 1440 1- 120222 2017 1- 120223 1417 1- 120223 2226 1- 120224 1310 1+ A129 - XRA 120224 1326 1+ A130 - XRA 120224 1826 1- 120225 1555 1- A130 - XRA 120225 2041 1- A122 - XRA 120226 1125 1- 120226 1423 1- 120226 1751 1- 120226 1938 1- 120226 2205 1- 120228 0805 1- A122 - XRA 120229 0736 1 A122 - XRA 120229 1417 1- A130 - XRA 120229 2230 1- ************************************************** Importance Summary - Feb 2012 1- events: 56 1 events: 7 1+ events: 7 2 events: 10 2+ events: 3 3 events: 0 3+ events: 0 ------------------ Total events: 83