Observations of geophone spurious resonance. Issue 1 (1st December 2019)

• Record Type: Journal Article
• Authors: Hearn, Steve; Strong, Shaun; Kinmont, Andrew
• Is Part Of: ASEG Extended Abstracts (Online). Volume 2019:Issue 1(2019)
• Page Start: 1
• Page End: 5
• Publication Date: 2019-12-01
• Subjects: broadband -- geophone -- resonance -- spurious frequency; Prospecting -- Geophysical methods -- Periodicals; Prospecting -- Geophysical methods; Periodicals
• DOI: 10.1080/22020586.2019.12073193
• Languages: English
• ISSNs: 2202-0586

Abstract

Summary: 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