Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 04.04.2012 beginning time = 1336 min.(UT), 22:16 UT Xbegin = -6.200 nT time of max = 1378 min.(UT), 22:58 UT Xmax = 8.972 nT Y at Xmax = 6.546 nT endtime = 1435 min.(UT), 23:55 UT Xend = -6.304 nT amplitude = 15.172 nT base duration time = 99 min. 2sigma = 4.070 nT duration at 2sigma = 20 min. flagbegin = 0 flagend = 0 flagxcheck = 0