Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 21.12.2020 beginning time = 1375 min.(UT), 22:55 UT Xbegin = -12.598 nT time of max = 1400 min.(UT), 23:20 UT Xmax = 23.702 nT Y at Xmax = -0.094 nT endtime = 1452 min.(UT), 24:12 UT Xend = -14.910 nT amplitude = 36.300 nT base duration time = 77 min. 2sigma = 6.963 nT duration at 2sigma = 30 min. flagbegin = 0 flagend = 0 flagxcheck = 0