Full text loading...
-
CHARACTERISTICS OF AUDIO AND SUB‐AUDIO TELLURIC SIGNALS*
- Source: Geophysical Prospecting, Volume 25, Issue 2, Apr 1977, p. 321 - 333
-
- 27 Apr 2006
Abstract
Abstract
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.