[seismology] In reflection seismology, a polarity reversal or phase change is a local amplitude seismic attribute anomaly that can indicate the presence of hydrocarbons and is therefore known as a direct hydrocarbon indicator. It primarily results from the change in polarity of the seismic response when a shale (with a lower acoustic impeda...
(from the article `Earth`) An important characteristic of Earth`s magnetic field is polarity reversal. In this process the direction of the dipole component reverses—i.e., the ...
reversing of the polarities of the electrodes of a cell, generally due to over-discharge of a low-capacity cell in a series arrangement
A change in the polarity of Earth's magnetic field in which the north magnetic pole becomes the sout
Reversal of the polarity of a battery or cell due to over discharge.