Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 13.07.2009 beginning time = 1257 min.(UT), 20:57 UT Xbegin = -2.862 nT time of max = 1290 min.(UT), 21:30 UT Xmax = 5.864 nT Y at Xmax = 3.374 nT endtime = 1305 min.(UT), 21:45 UT Xend = -2.686 nT amplitude = 8.726 nT base duration time = 48 min. 2sigma = 6.203 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0 flagxcheck = 0