This tutorial explains how to use the KHFFILT program (Karous-Hjelt filter software) to perform Karous-Hjelt and Fraser filtering on geophysical Very Low Frequency (VLF) data. VLF-EM data may be used for environmental geology, groundwater, and mineral exploration studies.

#Karous-Hjelt
#Fraser filtering
#VLF measurements
#VLF-EM
#vlf
#KHFFILT

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