Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 20.05.2007 beginning time = 1294 min.(UT), 21:34 UT Xbegin = -3.340 nT time of max = 1313 min.(UT), 21:53 UT Xmax = 6.120 nT Y at Xmax = -5.164 nT endtime = 1336 min.(UT), 22:16 UT Xend = -2.276 nT amplitude = 9.460 nT base duration time = 42 min. 2sigma = 3.434 nT duration at 2sigma = 21 min. flagbegin = 0 flagend = 0 flagxcheck = 0