Audio Frequency Airborne Electromagnetic Survey ( A-EM)
The Passive A-EM survey is based in part on the (AFMAG) airborne survey. Lightning
activity worldwide, combined with streaming potentials and oscillating magnetic fields
associated with Redox activity, present a powerful source of transient electromagnetic
energy radiating to the surface.
AAPG Publication Sep 2010, Calgary - Major Recent Improvements to Airborne Transient
Pulse Surveys for Hydrocarbon Exploration