Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 23.12.2008 beginning time = 1157 min.(UT), 19:17 UT Xbegin = -2.824 nT time of max = 1204 min.(UT), 20: 4 UT Xmax = 6.766 nT Y at Xmax = 2.164 nT endtime = 1220 min.(UT), 20:20 UT Xend = -0.732 nT amplitude = 9.590 nT base duration time = 63 min. 2sigma = 7.798 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0 flagxcheck = 0