Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 17.09.2011 beginning time = 1233 min.(UT), 20:33 UT Xbegin = -10.874 nT time of max = 1293 min.(UT), 21:33 UT Xmax = 8.408 nT Y at Xmax = -6.036 nT endtime = 1323 min.(UT), 22: 3 UT Xend = -5.514 nT amplitude = 19.282 nT base duration time = 90 min. 2sigma = 11.360 nT duration at 2sigma = 0 min. flagbegin = 0 flagend = 0 flagxcheck = 0