Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 21.12.2018 beginning time = 1142 min.(UT), 19: 2 UT Xbegin = -3.316 nT time of max = 1158 min.(UT), 19:18 UT Xmax = 6.538 nT Y at Xmax = -1.820 nT endtime = 1216 min.(UT), 20:16 UT Xend = -3.606 nT amplitude = 9.854 nT base duration time = 74 min. 2sigma = 2.981 nT duration at 2sigma = 26 min. flagbegin = 0 flagend = 0 flagxcheck = 0