Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 20.09.2012 beginning time = 1249 min.(UT), 20:49 UT Xbegin = -3.754 nT time of max = 1272 min.(UT), 21:12 UT Xmax = 5.866 nT Y at Xmax = -2.170 nT endtime = 1310 min.(UT), 21:50 UT Xend = -1.984 nT amplitude = 9.620 nT base duration time = 61 min. 2sigma = 4.249 nT duration at 2sigma = 18 min. flagbegin = 0 flagend = 0 flagxcheck = 0