Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 21.08.2017 beginning time = 1287 min.(UT), 21:27 UT Xbegin = -4.904 nT time of max = 1329 min.(UT), 22: 9 UT Xmax = 5.816 nT Y at Xmax = 1.542 nT endtime = 1369 min.(UT), 22:49 UT Xend = -5.412 nT amplitude = 10.720 nT base duration time = 82 min. 2sigma = 3.829 nT duration at 2sigma = 10 min. flagbegin = 0 flagend = 0 flagxcheck = 0