Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 28.09.2021 beginning time = 1118 min.(UT), 18:38 UT Xbegin = -6.382 nT time of max = 1146 min.(UT), 19: 6 UT Xmax = 11.218 nT Y at Xmax = 1.658 nT endtime = 1193 min.(UT), 19:53 UT Xend = -5.284 nT amplitude = 17.600 nT base duration time = 75 min. 2sigma = 6.299 nT duration at 2sigma = 30 min. flagbegin = 0 flagend = 0 flagxcheck = 0