Problem Statement |
For full-scale field data inversion of the crustal velocity model for Canterbury region, we use the velocity model (140km X 120km X 46km) developed by Lee. et al (2017) as the initial model and a test configuration including 43 seismic stations (not equally spacing at every 10km) and 146 earthquake to start the inversion. The observed data are processed including filtering from 0.02Hz to .5Hz, windowing to use only significant part of the signals. The source locations, magnitudes and shapes are determined prior to the inversion. A visco-elastic forward modelling is applied with consideration of the spatial attenuation from the observed data. After a number of inversion iterations, the final inverted model using FWT has matched well with the given 1-D model and the misfit error has significantly decreased. |
Tasks |
Preprocessing of the observed data and determination of sources.
Inversion: specify the number of iterations, optimization method or optimal step length (if applicable) and follow the steps for doing inversion at one iteration:
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Schedule |
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Verification |
Verifying the inverted result using FWT - Adjoint Wavefield method with FWT-Scattering Integral, SASW methods or other traditional seismic methods (invasive tests including CPT/ SPT, borehole logging). |