Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 29.04.2011 beginning time = 1285 min.(UT), 21:25 UT Xbegin = -25.296 nT time of max = 1315 min.(UT), 21:55 UT Xmax = 55.406 nT Y at Xmax = 20.192 nT endtime = 1346 min.(UT), 22:26 UT Xend = -24.462 nT amplitude = 80.702 nT base duration time = 61 min. 2sigma = 16.378 nT duration at 2sigma = 31 min. flagbegin = 0 flagend = 0 flagxcheck = 0