Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 04.04.2010 beginning time = 1328 min.(UT), 22: 8 UT Xbegin = -12.550 nT time of max = 1386 min.(UT), 23: 6 UT Xmax = 10.984 nT Y at Xmax = -0.940 nT endtime = 1447 min.(UT), 24: 7 UT Xend = -8.254 nT amplitude = 23.534 nT base duration time =119 min. 2sigma = 8.755 nT duration at 2sigma = 16 min. flagbegin = 0 flagend = 0 flagxcheck = 0