Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 04.08.2017 beginning time = 1374 min.(UT), 22:54 UT Xbegin = -9.926 nT time of max = 1422 min.(UT), 23:42 UT Xmax = 5.836 nT Y at Xmax = 1.284 nT endtime = 1474 min.(UT), 24:34 UT Xend = -2.594 nT amplitude = 15.762 nT base duration time =100 min. 2sigma = 9.462 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0 flagxcheck = 0