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CHARACTERISTICS OF AUDIO AND SUB‐AUDIO TELLURIC SIGNALS *
Author(s) -
TELFORD W. M.
Publication year - 1977
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1977.tb01172.x
Subject(s) - geology , audio frequency , azimuth , amplitude , signal (programming language) , audio signal , anisotropy , acoustics , range (aeronautics) , telecommunications , computer science , physics , materials science , optics , speech coding , sound pressure , composite material , programming language
A bstract Telluric current measurements in the audio and sub‐audio frequency range, made in various parts of Canada and South America over the past four years, indicate that the signal amplitude is relatively uniform over 6–8 midday hours (LMT) except in Chile and that the signal anisotropy is reasonably constant in azimuth.