Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 04.09.2017 beginning time = 1180 min.(UT), 19:40 UT Xbegin = -6.044 nT time of max = 1202 min.(UT), 20: 2 UT Xmax = 8.130 nT Y at Xmax = 1.318 nT endtime = 1235 min.(UT), 20:35 UT Xend = -2.808 nT amplitude = 14.174 nT base duration time = 55 min. 2sigma = 8.322 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0 flagxcheck = 0