Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 13.04.2008 beginning time = 1180 min.(UT), 19:40 UT Xbegin = -4.734 nT time of max = 1215 min.(UT), 20:15 UT Xmax = 6.652 nT Y at Xmax = -3.036 nT endtime = 1256 min.(UT), 20:56 UT Xend = -4.206 nT amplitude = 11.386 nT base duration time = 76 min. 2sigma = 4.842 nT duration at 2sigma = 10 min. flagbegin = 0 flagend = 0 flagxcheck = 0