Magnetic field reversal may refer to:
Geomagnetic reversal Brunhes–Matuyama reversal, approximately 780,000 years ago Gauss-Matuyama reversal, approximately 2.588 million years ago Jaramillo reversal, approximately one million years ago Laschamp event, a short reversal that occurred 41,000 years ago Reversal of the solar magnetic field Magnetization reversal, a process leading to a 180° reorientation of the magnetization vector with respect to its initial direction Polarity reversal (seismology), a local amplitude seismic anomaly
See also Geomagnetic excursion Polarity chron Pole shift hypothesis True polar wander