Title :
Time-Domain Electromagnetic Sounding
Author :
Harthill, Norman
Author_Institution :
Group Seven, Inc., Golden, CO 80401
Abstract :
The electrical structure of the earth can be studied effectively to depths of 3-5 km using a time-domain electromagnetic sounding method. In the method, an electromagnetic field is generated by passing a current step with an amplitude of several hundred amperes through a grounded wire 1-2 km in length. Then, the magnetic induction is detected and recorded at distances of 10-12 km. Experience with several thousand such soundings has shown them to provide accurate information on the electrical structure of the subsurface.
Keywords :
Conductivity; Earth; Electromagnetic fields; Electromagnetic measurements; Geoscience; Magnetic field measurement; Oceans; Time domain analysis; Volcanoes; Wire;
Journal_Title :
Geoscience Electronics, IEEE Transactions on
DOI :
10.1109/TGE.1976.294435
