Automating seismic waveform analysis for full 3-D waveform inversions

En Jui Lee, Po Chen

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

We present a semi-automatic seismic waveform selection algorithm that can be used in full 3-D waveform inversions for earthquake source parameters and/or earth structure models. The algorithm is applied on pairs of observed and synthetic seismograms. A pair of observed and synthetic seismograms are first segmented in thewavelet domain into a number ofwave packets using a topological watershed algorithm. A set of user-adjustable criteria based on waveform similarities is then applied to match each wave packet obtained from the observed seismogram with the corresponding wave packet obtained from the synthetic seismogram. The selected wave packet pairs are then used for extracting frequency-dependent phase and amplitude misfit measurements, which can be used in seismic source and/or structural inversions. The algorithm takes advantage of time-frequency representations of seismograms and is able to separate seismic phases in both time and frequency domains. We demonstrate the flexibility of this algorithm using examples of full 3-D waveform inversions for earthquake centroid moment tensors and earth structure models at different geographic scales.

原文English
頁(從 - 到)572-589
頁數18
期刊Geophysical Journal International
194
發行號1
DOIs
出版狀態Published - 2013 7月

All Science Journal Classification (ASJC) codes

  • 地球物理
  • 地球化學與岩石學

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