SUDDEN IONOSPHERIC DISTURBANCES 2006-07-06 Station Type Imp. Time Accuracy NIJMEJEN SPA-pa 2 08.22 - 08.28 - **.** definite >2min. NIJMEJEN SES 1 08.23 - 08.31 - 09.21 definite >2min. DESCRIPTION Ionospheric disturbances for a particular day: - Warning Centre or magnetic observatory (station), - type of phenomena, - importance of SID, - time (hour and minutes) of beginning-maximum-end of the SID, - definitiveness (in the scale: definite, reasonable, fair, questionable) and time qualifier (within or not within 2 minutes).