Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 31.12.2008 beginning time = 1215 min.(UT), 20:15 UT Xbegin = -2.720 nT time of max = 1245 min.(UT), 20:45 UT Xmax = 5.676 nT Y at Xmax = 3.406 nT endtime = 1288 min.(UT), 21:28 UT Xend = -4.240 nT amplitude = 8.396 nT base duration time = 73 min. 2sigma = 6.069 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0 flagxcheck = 0