Abstract
We develop and test a method to estimate local Vp/Vs, ratios for compact similar earthquake clusters using the precise P and S differential times obtained using waveform cross-correlation. We demonstrate how our technique works using synthetic data and evaluate likely errors arising from near-source takeoff angle differences between P and S waves. We use a robust misfit function method to compute Vp/Vs ratios for both synthetic data sets and several similar event clusters in southern California, and use a bootstrap resampling approach to estimate standard errors for real data. Our technique has higher resolution for near-source Vp/Vs ratios than typical tomographic inversion methods and provides constraints on near-fault rock properties.
Original language | English (US) |
---|---|
Pages (from-to) | 379-388 |
Number of pages | 10 |
Journal | Bulletin of the Seismological Society of America |
Volume | 97 |
Issue number | 2 |
DOIs | |
State | Published - Apr 2007 |
Externally published | Yes |
ASJC Scopus subject areas
- Geophysics
- Geochemistry and Petrology