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GEOREF RECORD

Spectral analysis of surface waves with simultaneous fiber optic distributed acoustic sensing and vertical geophones

Abstract

Experiments were performed comparing the response of fiber optic distributed acoustic sensing (DAS) to vertical geophones installed on the surface. The DAS consisted of an optical interrogator attached to an optical fiber. The fiber was part of an optical cable that was installed at depths of 0.3 to 0.76 meters in a coastal environment composed of unconsolidated sand. Seismic signals generated with an impact hammer were recorded simultaneously with both systems and directly compared. Experiments were performed with two different configurations, broadside and end-fire, between the source and the fiber optic cable. The seismic signals recorded in the two configurations and with the two sensor systems were processed identically using the Spectral Analysis of Surface Wave method. The results demonstrate the suitability and limitations of using DAS for near-surface seismic measurements.


ISSN: 1083-1363
EISSN: 1943-2658
Serial Title: Journal of Environmental & Engineering Geophysics
Serial Volume: 23
Serial Issue: 2
Title: Spectral analysis of surface waves with simultaneous fiber optic distributed acoustic sensing and vertical geophones
Affiliation: U. S. Army Engineer Research and Development Center, Geotechnical and Structures Laboratory, Vicksburg, MS, United States
Pages: 183-195
Published: 201806
Text Language: English
Publisher: Environmental and Engineering Geophysical Society, Englewood, CO, United States
References: 18
Accession Number: 2018-052885
Categories: Applied geophysicsSeismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables
Secondary Affiliation: Optical Sciences Division Naval Research Laboratory, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Abstract, copyright, Environmental & Engineering Geophysical Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2018
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