Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 20.02.2011 beginning time = 1157 min.(UT), 19:17 UT Xbegin = -3.456 nT time of max = 1190 min.(UT), 19:50 UT Xmax = 5.224 nT Y at Xmax = 9.474 nT endtime = 1228 min.(UT), 20:28 UT Xend = -5.854 nT amplitude = 8.680 nT base duration time = 71 min. 2sigma = 4.235 nT duration at 2sigma = 19 min. flagbegin = 0 flagend = 0 flagxcheck = 0