Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 31.03.2013 beginning time = 1260 min.(UT), 21: 0 UT Xbegin = -7.018 nT time of max = 1297 min.(UT), 21:37 UT Xmax = 6.572 nT Y at Xmax = -0.812 nT endtime = 1337 min.(UT), 22:17 UT Xend = -3.104 nT amplitude = 13.590 nT base duration time = 77 min. 2sigma = 3.792 nT duration at 2sigma = 33 min. flagbegin = 4 flagend = 0 flagxcheck = 0