Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 04.05.2010 beginning time = 1238 min.(UT), 20:38 UT Xbegin = -7.514 nT time of max = 1287 min.(UT), 21:27 UT Xmax = 11.210 nT Y at Xmax = -1.526 nT endtime = 1319 min.(UT), 21:59 UT Xend = -3.204 nT amplitude = 18.724 nT base duration time = 81 min. 2sigma = 5.781 nT duration at 2sigma = 28 min. flagbegin = 0 flagend = 0 flagxcheck = 0