Parameters of the midlatitude positive bays (MPB)
 Calculated at Space Research and Technology Institute, Sofia, Bulgaria
 
 Station: PAG
 Date of observation: 21.12.2011
 
 beginning time = 1084 min.(UT), 18: 4 UT
 Xbegin =         -4.264 nT
 time of max =    1134 min.(UT), 18:54 UT
 Xmax =            8.652 nT
 Y at Xmax =      -2.646 nT
 endtime =        1157 min.(UT), 19:17 UT
 Xend =           -2.592 nT
 amplitude =      12.916 nT
 base duration time = 73 min.
 2sigma =          3.993 nT
 duration at 2sigma = 27 min.
 flagbegin = 0
 flagend =   0
 flagxcheck = 0