Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 03.09.2013 beginning time = 1379 min.(UT), 22:59 UT Xbegin = -8.470 nT time of max = 1398 min.(UT), 23:18 UT Xmax = 10.790 nT Y at Xmax = 0.904 nT endtime = 1446 min.(UT), 24: 6 UT Xend = -6.204 nT amplitude = 19.260 nT base duration time = 67 min. 2sigma = 4.630 nT duration at 2sigma = 37 min. flagbegin = 0 flagend = 0 flagxcheck = 0