On the precision of noise correlation interferometry

Richard L. Weaver, Céline Hadziioannou, Eric Larose, Michel Campillo

Research output: Contribution to journalArticlepeer-review


Long duration noisy-looking waveforms such as those obtained in randomly multiple scattering and reverberant media are complex; they resist direct interpretation. Nevertheless, such waveforms are sensitive to small changes in the source of the waves or in the medium in which they propagate. Monitoring such waveforms, whether obtained directly or obtained indirectly by noise correlation, is emerging as a technique for detecting changes in media. Interpretation of changes is in principle problematic; it is not always clear whether a change is due to sources or to the medium. Of particular interest is the detection of small changes in propagation speeds. An expression is derived here for the apparent, but illusory, waveform dilation due to a change of source. The expression permits changes in waveforms due to changes in wave speed to be distinguished with high precision from changes due to other reasons. The theory is successfully compared with analysis of a laboratory ultrasonic data set and a seismic data set from Parkfield California.

Original languageEnglish (US)
Pages (from-to)1384-1392
Number of pages9
JournalGeophysical Journal International
Issue number3
StatePublished - Jun 2011


  • Coda waves
  • Rheology: crusts and lithosphere
  • Theoretical seismology
  • Time series analysis
  • Wave scattering and diffraction

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology


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