Green functions between antipodal station pairs from cross-correlation of ambient noises

Shi Lin Li, Ge Jin, Pei Ying Lin, Yong Shun Chen*, Zeng Xi Ge

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Ambient-noise cross-correlation is widely used to retrieve the Green function between two seismic stations. The Green functions of several body-wave phases between two near antipodal stations can be extracted by cross-correlating the coda waves of large earthquakes. In this study, we cross-correlate the data from Peking University temporary seismic arrays and China provincial seismic network in the Qinling and the data from the GSN (Global Seismographic Network) stations in South America to retrieve body-wave Green functions. The cross-correlation result clearly shows several body-wave phases (e.g., PKIKP, PP, PcPPKP, SKSP). Meanwhile, very similar Green-function waveforms can be retrieved by cross-correlating the synthetic seismograms generated from a 1D Earth model. This result suggests that free oscillations (normal modes) generated by large earthquakes are the most important energy source for the body-wave Green functions. The synthetic test also indicates that focal mechanism can influence the correlation result, e.g. the PKIKP phase cannot be observed if only strike-slip events are stacked. Our results suggest that by rejecting strike-slip events during the processing, we can increase the signal-to-noise ratio of the Green functions and reduce the computation time. Our study provides an example to demonstrate that the body-wave Green function may contain heterogeneity information of the Earth.

Original languageEnglish
Pages (from-to)2028-2038
Number of pages11
JournalActa Geophysica Sinica
Issue number6
Publication statusPublished - 2016 Jun 1
Externally publishedYes


  • Ambient noise
  • Green function
  • Moment tensor
  • Normal mode
  • Synthetic seismogram

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology


Dive into the research topics of 'Green functions between antipodal station pairs from cross-correlation of ambient noises'. Together they form a unique fingerprint.

Cite this