Publication Name: Australasian Exploration Geoscience Conference 2019
Authors: Steve Hearn*, Shaun Strong, Andrew Kinmont
Date Published: September 2019
Number of Pages: 5
Abstract:
A detailed understanding of the frequency response of geophones is critical for the design and quality control of broadband seismic surveys. We illustrate a pragmatic methodology for accurate identification of geophone spurious resonances. We include tap-test examples from conventional 10 Hz geophones, and from 5 Hz and 10 Hz high-output nodal sensors. High-frequency noise sources, including high-voltage harmonics can interfere with the accurate identification of the spurious events. This problem can be overcome by subtraction of matched noise spectra.