A zoomed-in time series between 17:10 and 17:19 of the magnetotail flapping event in local (LMN) coordinates. (a) B_L, B_M, and B_N magnetic field rotated from MSO to LMN with the eigenvector basis L = (0.967, 0.152, −0.203), M = (0.181, 0.148, 0.972), and N = (0.178, −0.977, 0.116). (b) Magnetic field magnitude during the same interval. The five current-sheet crossings identified are C1–C5, marked with dashed gray lines. The accompanying yellow interval is the interval used for MVA on each individual crossing. Note that C5 does not have a yellow interval because MVA is unable to be calculated for C5. B_L approaches 0 but is still slightly negative at the C5 crossing time. Instead of crossing to positive B_L, B_L dips back to negative before rising again to cross the current sheet again about 15 s later. (c) The resulting n_M and n_N components from MVA for C1–C4. (d) The resulting n_L and n_N components from MVA for C1–C4.