Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 17.08.2021 beginning time = 1332 min.(UT), 22:12 UT Xbegin = -5.520 nT time of max = 1363 min.(UT), 22:43 UT Xmax = 5.346 nT Y at Xmax = -1.606 nT endtime = 1415 min.(UT), 23:35 UT Xend = -1.888 nT amplitude = 10.866 nT base duration time = 83 min. 2sigma = 3.357 nT duration at 2sigma = 32 min. flagbegin = 0 flagend = 0 flagxcheck = 0