Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 09.04.2008 beginning time = 1176 min.(UT), 19:36 UT Xbegin = -4.414 nT time of max = 1197 min.(UT), 19:57 UT Xmax = 6.532 nT Y at Xmax = -1.026 nT endtime = 1230 min.(UT), 20:30 UT Xend = -3.476 nT amplitude = 10.946 nT base duration time = 54 min. 2sigma = 5.168 nT duration at 2sigma = 10 min. flagbegin = 0 flagend = 0 flagxcheck = 0