Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 22.04.2007 beginning time = 1336 min.(UT), 22:16 UT Xbegin = -5.878 nT time of max = 1379 min.(UT), 22:59 UT Xmax = 7.390 nT Y at Xmax = -0.112 nT endtime = 1418 min.(UT), 23:38 UT Xend = -6.680 nT amplitude = 13.268 nT base duration time = 82 min. 2sigma = 5.406 nT duration at 2sigma = 27 min. flagbegin = 0 flagend = 0 flagxcheck = 0