Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 21.03.2011 beginning time = 1394 min.(UT), 23:14 UT Xbegin = -3.638 nT time of max = 1424 min.(UT), 23:44 UT Xmax = 6.230 nT Y at Xmax = -1.732 nT endtime = 1450 min.(UT), 24:10 UT Xend = -6.038 nT amplitude = 9.868 nT base duration time = 56 min. 2sigma = 2.948 nT duration at 2sigma = 21 min. flagbegin = 0 flagend = 0 flagxcheck = 0