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A LOW‐FREQUENCY REFRACTION GEOPHONE *
Author(s) -
JONES W. M.,
DENNISON A. T.
Publication year - 1955
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.1365-2478.1955.tb01367.x
Subject(s) - geophone , geology , refraction , ohm , economic geology , gemology , acoustics , seismic refraction , seismology , optics , telmatology , electrical engineering , engineering geology , physics , engineering , volcanism , tectonics
This paper describes a highly portable geophone, designed for large‐scale refraction surveying, which uses a novel suspension system to obtain a natural frequency of about 1.85 c/s. The nominal output is 0.7 volts/cm/second into a 500 ohm load, the damping then being 0.7 of critical. Some typical recorded arrivals obtained with this geophone are illustrated.