Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 09.12.2018 beginning time = 1179 min.(UT), 19:39 UT Xbegin = -11.286 nT time of max = 1201 min.(UT), 20: 1 UT Xmax = 10.960 nT Y at Xmax = 1.798 nT endtime = 1261 min.(UT), 21: 1 UT Xend = -3.248 nT amplitude = 22.246 nT base duration time = 82 min. 2sigma = 7.279 nT duration at 2sigma = 29 min. flagbegin = 0 flagend = 0 flagxcheck = 0