Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 11.12.2007 beginning time = 1204 min.(UT), 20: 4 UT Xbegin = -11.560 nT time of max = 1267 min.(UT), 21: 7 UT Xmax = 10.746 nT Y at Xmax = 11.418 nT endtime = 1302 min.(UT), 21:42 UT Xend = -6.846 nT amplitude = 22.306 nT base duration time = 98 min. 2sigma = 6.945 nT duration at 2sigma = 28 min. flagbegin = 4 flagend = 0 flagxcheck = 0