Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 12.12.2015 beginning time = 1230 min.(UT), 20:30 UT Xbegin = -2.140 nT time of max = 1248 min.(UT), 20:47 UT Xmax = 5.330 nT Y at Xmax = 1.250 nT endtime = 1272 min.(UT), 21:12 UT Xend = -4.084 nT amplitude = 7.470 nT base duration time = 42 min. 2sigma = 4.536 nT duration at 2sigma = 8 min. flagbegin = 0 flagend = 0