CPC G01R 29/0842 (2013.01) [G01R 1/06788 (2013.01); G01R 27/28 (2013.01); G01R 29/0878 (2013.01); G01R 31/085 (2013.01); G01R 31/52 (2020.01); G01R 31/58 (2020.01); H04M 1/24 (2013.01); H04M 3/28 (2013.01); H04M 3/30 (2013.01)] | 26 Claims |
1. A method for generating a subsurface image comprising:
detecting a transient event in an electrical power line at two or more predetermined locations in the electrical power line;
detecting, at the two or more predetermined locations, an electrical signal induced in the power line by a return electromagnetic signal that is generated by eddy currents induced in the subsurface by the transient event; and
processing the detected electrical signal and transient event to generate a subsurface image.
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