Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 21.04.2017 beginning time = 1305 min.(UT), 21:45 UT Xbegin = 0.986 nT time of max = 1319 min.(UT), 21:59 UT Xmax = 19.990 nT Y at Xmax = -5.850 nT endtime = 1339 min.(UT), 22:19 UT Xend = -12.420 nT amplitude = 19.004 nT base duration time = 34 min. 2sigma = 14.404 nT duration at 2sigma = 10 min. flagbegin = 0 flagend = 0 flagxcheck = 0