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The Potential of DAS in Teleseismic Studies: Insights From the Goldstone Experiment

Geophysical research letters, 2019-01, Vol.46 (3) [Peer Reviewed Journal]

ISSN: 0094-8276 ;EISSN: 1944-8007

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  • Title:
    The Potential of DAS in Teleseismic Studies: Insights From the Goldstone Experiment
  • Author: Yu, Chunquan ; Zhan, Zhongwen ; Lindsey, Nathaniel J. ; Ajo‐Franklin, Jonathan B. ; Robertson, Michelle
  • Subjects: distributed acoustic sensing ; GEOSCIENCES ; receiver functions ; structural imaging ; surface wave analyses
  • Is Part Of: Geophysical research letters, 2019-01, Vol.46 (3)
  • Description: Distributed acoustic sensing (DAS) is a recently developed technique that has demonstrated its utility in the oil and gas industry. Here we demonstrate the potential of DAS in teleseismic studies using the Goldstone OpticaL Fiber Seismic experiment in Goldstone, California. By analyzing teleseismic waveforms from the 10 January 2018 M7.5 Honduras earthquake recorded on ~5,000 DAS channels and the nearby broadband station GSC, we first compute receiver functions for DAS channels using the vertical-component GSC velocity as an approximation for the incident source wavelet. The Moho P-to-s conversions are clearly visible on DAS receiver functions. Here, we then derive meter-scale arrival time measurements along the entire 20-km-long array. We are also able to measure path-averaged Rayleigh wave group velocity and local Rayleigh wave phase velocity. The latter, however, has large uncertainties. Our study suggests that DAS will likely play an important role in many fields of passive seismology in the near future.
  • Publisher: United States: American Geophysical Union
  • Language: English
  • Identifier: ISSN: 0094-8276
    EISSN: 1944-8007
  • Source: Wiley Blackwell AGU Digital Library
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