Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 11.09.2011 beginning time = 1371 min.(UT), 22:51 UT Xbegin = -8.420 nT time of max = 1397 min.(UT), 23:17 UT Xmax = 22.446 nT Y at Xmax = -1.036 nT endtime = 1436 min.(UT), 23:56 UT Xend = -6.742 nT amplitude = 30.866 nT base duration time = 65 min. 2sigma = 7.381 nT duration at 2sigma = 28 min. flagbegin = 0 flagend = 0 flagxcheck = 0