EM fields diffusing in the earth: (a) electric field in y-direction and (b) time derivative of the magnetic field (db/dt); the chargeable cylinder is outlined in white. At early times (0.01-0.3 ms), EM induction is dominant resulting in inductive electric fields rotating counter-clockwise direction and d\b/dt fields going upward. However, at 6ms the reversed direction (clockwise) of the electric field is generated due to the chargeable cylinder; similarly db/dt fields goes upward (red arrows) and results in negative transients at a receiver loop.

Please refer to below for citing this video:

Seogi Kang, Douglas W. Oldenburg & Lindsey J. Heagy (2020) Detecting induced polarisation effects in time-domain data: a modelling study using stretched exponentials, Exploration Geophysics, 51:1, 122-133, DOI: 10.1080/08123985.2019.1690393

This video was generated by simpegEMIP package, which is available in
[ Ссылка ]

свернуть