Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 31.10.2007 beginning time = 1078 min.(UT), 17:58 UT Xbegin = -4.372 nT time of max = 1107 min.(UT), 18:27 UT Xmax = 7.046 nT Y at Xmax = 1.312 nT endtime = 1155 min.(UT), 19:15 UT Xend = -5.236 nT amplitude = 11.418 nT base duration time = 77 min. 2sigma = 3.211 nT duration at 2sigma = 30 min. flagbegin = 0 flagend = 2 flagxcheck = 0