Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 10.09.2011 beginning time = 1290 min.(UT), 21:30 UT Xbegin = -19.982 nT time of max = 1370 min.(UT), 22:50 UT Xmax = 17.076 nT Y at Xmax = -28.112 nT endtime = 1383 min.(UT), 23: 3 UT Xend = 1.530 nT amplitude = 37.058 nT base duration time = 93 min. 2sigma = 12.495 nT duration at 2sigma = 10 min. flagbegin = 4 flagend = 0 flagxcheck = 2