Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 09.07.2011 beginning time = 1339 min.(UT), 22:19 UT Xbegin = -5.228 nT time of max = 1404 min.(UT), 23:24 UT Xmax = 9.148 nT Y at Xmax = -2.728 nT endtime = 1443 min.(UT), 24: 3 UT Xend = -3.859 nT amplitude = 14.376 nT base duration time =104 min. 2sigma = 6.202 nT duration at 2sigma = 15 min. flagbegin = 4 flagend = 0 flagxcheck = 0