Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 25.12.2017 beginning time = 1089 min.(UT), 18: 9 UT Xbegin = -5.322 nT time of max = 1149 min.(UT), 19: 9 UT Xmax = 8.488 nT Y at Xmax = -0.358 nT endtime = 1179 min.(UT), 19:39 UT Xend = -5.730 nT amplitude = 13.810 nT base duration time = 90 min. 2sigma = 4.795 nT duration at 2sigma = 18 min. flagbegin = 4 flagend = 0 flagxcheck = 0