SUDDEN IONOSPHERIC DISTURBANCES  2006-08-21

Station     Type          Imp.          Time             Accuracy
NIJMEJEN    SPA-pa         1+   12.14 - 12.19 - 12.44    definite >2min.     
NIJMEJEN    SES            1-   12.15 - 12.20 - 12.42    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).