Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 10.04.2008 beginning time = 1200 min.(UT), 20: 0 UT Xbegin = -2.240 nT time of max = 1214 min.(UT), 20:14 UT Xmax = 7.602 nT Y at Xmax = 0.200 nT endtime = 1241 min.(UT), 20:41 UT Xend = -7.304 nT amplitude = 9.842 nT base duration time = 41 min. 2sigma = 4.577 nT duration at 2sigma = 17 min. flagbegin = 0 flagend = 0 flagxcheck = 0