Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 18.12.2013 beginning time = 1322 min.(UT), 22: 2 UT Xbegin = -3.620 nT time of max = 1351 min.(UT), 22:31 UT Xmax = 6.544 nT Y at Xmax = 2.200 nT endtime = 1388 min.(UT), 23: 8 UT Xend = -2.814 nT amplitude = 10.164 nT base duration time = 66 min. 2sigma = 2.296 nT duration at 2sigma = 28 min. flagbegin = 0 flagend = 0 flagxcheck = 0