Leakage Field : This is the magnetic field forced out of the material into the air by the distortion of the field within the material caused by the presence of a discontinuity. (RP 5A5)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}