Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 20.09.2017 beginning time = 1138 min.(UT), 18:58 UT Xbegin = -5.622 nT time of max = 1156 min.(UT), 19:16 UT Xmax = 6.882 nT Y at Xmax = 9.022 nT endtime = 1206 min.(UT), 20: 6 UT Xend = -3.602 nT amplitude = 12.504 nT base duration time = 68 min. 2sigma = 4.984 nT duration at 2sigma = 10 min. flagbegin = 0 flagend = 0 flagxcheck = 0