Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 20.09.2007 beginning time = 1165 min.(UT), 19:25 UT Xbegin = -8.590 nT time of max = 1198 min.(UT), 19:58 UT Xmax = 7.592 nT Y at Xmax = -7.838 nT endtime = 1237 min.(UT), 20:37 UT Xend = -7.586 nT amplitude = 16.182 nT base duration time = 72 min. 2sigma = 7.250 nT duration at 2sigma = 3 min. flagbegin = 0 flagend = 0 flagxcheck = 0