Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 01.08.2007 beginning time = 1140 min.(UT), 19: 0 UT Xbegin = -7.856 nT time of max = 1175 min.(UT), 19:35 UT Xmax = 7.724 nT Y at Xmax = 0.648 nT endtime = 1203 min.(UT), 20: 3 UT Xend = 1.866 nT amplitude = 15.580 nT base duration time = 63 min. 2sigma = 9.030 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0 flagxcheck = 0