Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 27.09.2007 beginning time = 1193 min.(UT), 19:53 UT Xbegin = -10.140 nT time of max = 1234 min.(UT), 20:34 UT Xmax = 15.992 nT Y at Xmax = 9.426 nT endtime = 1295 min.(UT), 21:35 UT Xend = -10.826 nT amplitude = 26.132 nT base duration time =102 min. 2sigma = 9.812 nT duration at 2sigma = 26 min. flagbegin = 0 flagend = 0 flagxcheck = 0