Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 21.04.2015 beginning time = 1311 min.(UT), 21:51 UT Xbegin = -6.220 nT time of max = 1328 min.(UT), 22: 8 UT Xmax = 6.840 nT Y at Xmax = -9.378 nT endtime = 1340 min.(UT), 22:20 UT Xend = 1.182 nT amplitude = 13.060 nT base duration time = 29 min. 2sigma = 7.187 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0