Parameters of the midlatitude positive bays (MPB) Calculated at Space Research and Technology Institute, Sofia, Bulgaria Station: PAG Date of observation: 21.10.2017 beginning time = 1363 min.(UT), 22:43 UT Xbegin = -11.146 nT time of max = 1410 min.(UT), 23:30 UT Xmax = 12.958 nT Y at Xmax = -3.376 nT endtime = 1450 min.(UT), 24:10 UT Xend = -5.170 nT amplitude = 24.104 nT base duration time = 87 min. 2sigma = 5.452 nT duration at 2sigma = 25 min. flagbegin = 0 flagend = 0 flagxcheck = 0