We report Magnetospheric Multiscale observations of electron pressure
gradient electric fields near a magnetic reconnection diffusion region using a
new technique for extracting 7.5 ms electron moments from the Fast Plasma
Investigation. We find that the deviation of the perpendicular electron bulk
velocity from $E \times B$ drift in the interval where the out-of-plane current
density is increasing can be explained by the diamagnetic drift. In the
interval where the out-of-plane current is transitioning to in-plane current,
the electron momentum equation is not satisfied at 7.5 ms resolution.
