Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 14.12.2010 beginning time = 1090 min.(UT), 18:10 UT Xbegin = -13.136 nT time of max = 1156 min.(UT), 19:16 UT Xmax = 10.200 nT Y at Xmax = -9.408 nT endtime = 1201 min.(UT), 20: 1 UT Xend = -8.654 nT amplitude = 23.336 nT base duration time =111 min. 2sigma = 7.133 nT duration at 2sigma = 18 min. flagbegin = 4 flagend = 0 flagxcheck = 0