Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 12.12.2007 beginning time = 1277 min.(UT), 21:17 UT Xbegin = -3.778 nT time of max = 1323 min.(UT), 22: 3 UT Xmax = 8.232 nT Y at Xmax = 3.194 nT endtime = 1372 min.(UT), 22:52 UT Xend = -4.410 nT amplitude = 12.010 nT base duration time = 95 min. 2sigma = 5.249 nT duration at 2sigma = 27 min. flagbegin = 0 flagend = 0 flagxcheck = 0