Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 31.05.2013 beginning time = 1414 min.(UT), 23:34 UT Xbegin = -19.918 nT time of max = 1440 min.(UT), 24: 0 UT Xmax = 4.071 nT Y at Xmax = 7.796 nT endtime = 1497 min.(UT), 24:57 UT Xend = -9.048 nT amplitude = 25.320 nT base duration time = 83 min. 2sigma = 7.130 nT duration at 2sigma = 37 min. flagbegin = 0 flagend = 0 flagxcheck = 2