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| | Abstract | | Based on the theory of seismic interferometry, we have applied the auto-correlation analysis to the SH wave strong-motion records acquired at the seismic stations on the Noubi Plain (Watanabe et al., 2011). We applied the cross-correlation analysis to the same records in order to improve the spatial density of the records. Comparison of the waveform observed at two stations located nearby revealed low correlation between the waveforms, resulting in low reliability of the cross-correlation analysis, possibly due to station characteristics including installation condition and effect of buildings. Stacking causal and anti-causal parts of cross-correlation may reduce this effect. Problems on synthesis of S-wave reflection record, such as stacking strategy to recover the reflection waves from a small number of earthquake records and coarse station distribution, are also discussed. |
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