Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 13.04.2013 beginning time = 1371 min.(UT), 22:51 UT Xbegin = -11.318 nT time of max = 1380 min.(UT), 23: 0 UT Xmax = 9.450 nT Y at Xmax = -3.640 nT endtime = 1398 min.(UT), 23:18 UT Xend = 3.244 nT amplitude = 20.768 nT base duration time = 27 min. 2sigma = 3.939 nT duration at 2sigma = 19 min. flagbegin = 0 flagend = 0 flagxcheck = 0