Improved imaging with phase-weighted common conversion point stacks of receiver functions

A. Frassetto, George Zandt, H. Gilbert, T. J. Owens, C. H. Jones

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Broad-band array studies frequently stack receiver functions to improve their signal-to-noise ratio while mapping structures in the crust and upper mantle. Noise may produce spurious secondary arrivals that obscure or mimic arrivals produced by P-to-S conversions at large contrasts in seismic impedance such as the Moho. We use a Hilbert transform to calculate phase-weights, which minimize the constructive stacking of erroneous signal in receiver function data sets. We outline this approach and demonstrate its application through synthetic data combined with different types of noise, a previously published example of signal-generated noise, and a large data set from the Sierra Nevada EarthScope Project. These examples show that phase-weighting reduces the presence of signal-generated noise in receiver functions and improves stacked data sets.

Original languageEnglish (US)
Pages (from-to)368-374
Number of pages7
JournalGeophysical Journal International
Volume182
Issue number1
DOIs
StatePublished - Jul 2010
Externally publishedYes

Fingerprint

receivers
Imaging techniques
arrivals
Signal to noise ratio
Moho
stacking
signal-to-noise ratio
upper mantle
crusts
Earth mantle
signal to noise ratios
transform
impedance
crust
broadband
stack

Keywords

  • Crustal structure
  • Image processing
  • Interface waves
  • Site effects
  • Wave scattering and diffraction

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Improved imaging with phase-weighted common conversion point stacks of receiver functions. / Frassetto, A.; Zandt, George; Gilbert, H.; Owens, T. J.; Jones, C. H.

In: Geophysical Journal International, Vol. 182, No. 1, 07.2010, p. 368-374.

Research output: Contribution to journalArticle

Frassetto, A. ; Zandt, George ; Gilbert, H. ; Owens, T. J. ; Jones, C. H. / Improved imaging with phase-weighted common conversion point stacks of receiver functions. In: Geophysical Journal International. 2010 ; Vol. 182, No. 1. pp. 368-374.
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