Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 20.04.2021 beginning time = 1202 min.(UT), 20: 2 UT Xbegin = -7.504 nT time of max = 1275 min.(UT), 21:15 UT Xmax = 7.156 nT Y at Xmax = 4.228 nT endtime = 1314 min.(UT), 21:54 UT Xend = -8.628 nT amplitude = 14.660 nT base duration time =112 min. 2sigma = 7.349 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0 flagxcheck = 0