Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 07.08.2009 beginning time = 1151 min.(UT), 19:11 UT Xbegin = -5.622 nT time of max = 1205 min.(UT), 20: 5 UT Xmax = 7.184 nT Y at Xmax = 5.218 nT endtime = 1253 min.(UT), 20:53 UT Xend = -4.790 nT amplitude = 12.806 nT base duration time =102 min. 2sigma = 4.148 nT duration at 2sigma = 24 min. flagbegin = 0 flagend = 4 flagxcheck = 0