Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 04.02.2011 beginning time = 1178 min.(UT), 19:38 UT Xbegin = -29.260 nT time of max = 1259 min.(UT), 20:59 UT Xmax = 22.954 nT Y at Xmax = 22.334 nT endtime = 1282 min.(UT), 21:22 UT Xend = -13.798 nT amplitude = 52.214 nT base duration time =104 min. 2sigma = 16.158 nT duration at 2sigma = 11 min. flagbegin = 4 flagend = 0 flagxcheck = 0