Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 31.10.2009 beginning time = 1256 min.(UT), 20:56 UT Xbegin = -0.432 nT time of max = 1266 min.(UT), 21: 6 UT Xmax = 5.416 nT Y at Xmax = 0.062 nT endtime = 1307 min.(UT), 21:47 UT Xend = -1.878 nT amplitude = 5.848 nT base duration time = 51 min. 2sigma = 1.799 nT duration at 2sigma = 2 min. flagbegin = 0 flagend = 0 flagxcheck = 0