Systematic Recovery of Instrumental Timing Errors Using Interferometric Surface Waves Retrieved from Large N Seismic Arrays

C. Weemstra, J. de Laat, A. Verdel

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Timing errors are a notorious problem in seismic data acquisition and processing. A technique is presented that allows such timing errors to be recovered in a systematic fashion. The methodology relies on virtual- source responses retrieved through the application of seismic interferometry (SI). In application to recordings of ambient seismic noise, SI involves temporal averaging of time-windowed crosscorrelation measurements. The retrieved interferometric responses are typically dominated by surface waves. Under favorable conditions, these interferometric responses therefore approach the surface-wave part of the medium's Green's function. Additionally, however, its time-reverse is often also retrieved. This implies time-symmetry of the time-averaged receiver-receiver crosscorrelations. In this study, this time-symmetry is exploited: by comparing the arrival time of the direct surface wave at positive time to the arrival time of the direct surface wave at negative time for a large a number of receiver- receiver pairs, relative timing errors can be determined in a weighted least-squared sense. The proposed methodology is validated using synthetic data. The results hold particular promise for large N seismic arrays.
Original languageEnglish
Title of host publicationEAGE GeoTech 2021 First EAGE Workshop on Induced Seismicity
Subtitle of host publicationMarch 1-5, 2021
PublisherEAGE
Pages1-5
Number of pages5
DOIs
Publication statusPublished - 2021
Event1st EAGE Workshop on Induced Seismicity, EAGE GeoTech 2021 - Virtual, Online
Duration: 3 Mar 20214 Mar 2021

Conference

Conference1st EAGE Workshop on Induced Seismicity, EAGE GeoTech 2021
CityVirtual, Online
Period3/03/214/03/21

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