Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 22.12.2007 beginning time = 1169 min.(UT), 19:29 UT Xbegin = -7.982 nT time of max = 1202 min.(UT), 20: 2 UT Xmax = 12.638 nT Y at Xmax = -2.396 nT endtime = 1246 min.(UT), 20:46 UT Xend = -4.512 nT amplitude = 20.620 nT base duration time = 77 min. 2sigma = 5.351 nT duration at 2sigma = 28 min. flagbegin = 0 flagend = 0 flagxcheck = 0