- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | WANG Hongwei, REN Yefei, WEN Ruizhi, ZHOU Ying. Reliability Analysis on Non-Parametric Spectral Inversion of Seismic Ground Motion[J]. Journal of Southwest Jiaotong University, 2022, 57(1): 182-190. doi: 10.3969/j.issn.0258-2724.20200241
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Non-parametric spectral inversion is the key technology to study the seismic source, propagation path and site effects. The reliability of spectral inversion was responsible for exactly understanding seismic source physics and effectively predicting seismic hazards. In this work, the non-parametric spectral inversion of ground motions during the 2016—2017 central Italy seismic sequence was used to systematically evaluate how the reliability of spectral inversion was dominantly controlled by several decisive factors, i.e., constraints for trade-offs between source and site terms, selection of one- or two-step non-parametric inversion methods, and potential effects of trade-offs among the parameters describing source spectra on their estimations. Results show the crucial effects of reference site on the inversion reliability. Multiple trials for the source spectra and source parameters were necessary for selecting the appropriate reference sites, which were preliminarily regarded as rock sites based on the surface geological information, the horizontal-to-vertical spectral ratios, etc. The usage of either one- or two-step method has obvious effects on high-frequency propagation path attenuation at far fields. However, negligible effects occurred on source parameter estimates. The one-step method was preferred because the path attenuation given by two-step method could be interfered by the site term. In order to eliminate the effects of trade-offs between corner frequency (
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