Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 03.09.2009 beginning time = 1277 min.(UT), 21:17 UT Xbegin = -5.116 nT time of max = 1297 min.(UT), 21:37 UT Xmax = 5.140 nT Y at Xmax = -3.920 nT endtime = 1313 min.(UT), 21:53 UT Xend = -0.124 nT amplitude = 10.256 nT base duration time = 36 min. 2sigma = 3.390 nT duration at 2sigma = 16 min. flagbegin = 0 flagend = 0 flagxcheck = 0