Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 13.12.2017 beginning time = 1110 min.(UT), 18:30 UT Xbegin = -5.912 nT time of max = 1161 min.(UT), 19:21 UT Xmax = 6.700 nT Y at Xmax = 3.752 nT endtime = 1195 min.(UT), 19:55 UT Xend = -0.782 nT amplitude = 12.612 nT base duration time = 85 min. 2sigma = 5.269 nT duration at 2sigma = 14 min. flagbegin = 4 flagend = 0 flagxcheck = 0