Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 28.02.2007 beginning time = 1265 min.(UT), 21: 5 UT Xbegin = -10.280 nT time of max = 1298 min.(UT), 21:38 UT Xmax = 8.834 nT Y at Xmax = 1.232 nT endtime = 1337 min.(UT), 22:17 UT Xend = -7.060 nT amplitude = 19.114 nT base duration time = 72 min. 2sigma = 7.969 nT duration at 2sigma = 8 min. flagbegin = 2 flagend = 0 flagxcheck = 0