Electromagnetic (EM) induction is
process by which an EM wave is emitted from
a transmitter while a receiver records
modifications made to the original wave
after it passes through the subsurface.
This resultant waveform can be used to
interpret the physical properties of the
subsurface in terms of conductivity.
Variations of subsurface conductivity and
metal content can be measured through
electromagnetic (EM) induction.
This technique can be used to
locate subsurface utilities, underground
storage tanks (USTs), and contaminant
plumes.
The Near Surface Geophysics Lab
at Kutztown University owns a
GEM 2 Multifrequency EM System
from
Geophex
and an
EM34-3XL from
Geonics Limited.
The GEM 2 was obtained via the US
Department of Energy's
Laboratory Equipment Donation Program.
It was previously owned by
Idaho National Laboratory. The EM34-3XL
was
donated by the Las
Vegas branch of the Environmental Protection Agency (EPA).
The mapping software
Oasis Montaj
and
Surfer are used to plot and process the data at KU.
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