Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 18.09.2017 beginning time = 1131 min.(UT), 18:51 UT Xbegin = -7.306 nT time of max = 1154 min.(UT), 19:14 UT Xmax = 12.178 nT Y at Xmax = 1.640 nT endtime = 1201 min.(UT), 20: 1 UT Xend = -1.032 nT amplitude = 19.484 nT base duration time = 70 min. 2sigma = 8.565 nT duration at 2sigma = 13 min. flagbegin = 0 flagend = 0 flagxcheck = 0