https://scholars.lib.ntu.edu.tw/handle/123456789/571648
標題: | Joint inversion of geodetic observations and relative weighting-the 1999 Mω 7.6 chi-chi earthquake revisited | 作者: | Roger M Li Z Clarke P Song C Hu J.-C Feng W Yi L. JYR-CHING HU |
關鍵字: | Earthquakes; Geodesy; Geometrical optics; Holography; Particle swarm optimization (PSO); Radar imaging; Radar measurement; Synthetic aperture radar; Akaike's bayesian information criterions; ChiChi earthquake; Geodetic measurements; Geodetic observation; Joint inversion; Slip distribution; Vegetation coverage; Weight determination; Bayesian information criterion; Faulting | 公開日期: | 2020 | 卷: | 12 | 期: | 19 | 來源出版物: | Remote Sensing | 摘要: | The Mw 7.6 Chi-Chi earthquake struck central western Taiwan in 1999. The rupture was complex with several dislocations along the 100-km long Chelungpu thrust fault. Revisiting this earthquake is a challenge, as the precision and coverage of the data sets available are quite poor. Furthermore, the topographic and vegetation coverage complexity of the area prevents coherent radar images. In this paper, radar and optical images, and terrestrial geodetic measurements, were utilised to study the fault. The Particle Swarm Optimization and Okada Inversion (PSOKINV) geodetic inversion package was used with the generalized Akaike's Bayesian Information Criterion (gABIC) to precisely determine the slip distribution and relative weighting of datasets. Differences in results using the data sets jointly or separately (e.g., under-estimation due to InSAR, inconsistencies in SPOT offsets, smoother slip distribution with gABIC weighting) are observable. Most of the energy was released in the northern part of the fault, where the strike veers toward the east, and mainly at depths less than 4 km. The PSOKINV-gABIC approach is viable for the study of complicated cases such as the Chi-Chi earthquake and can significantly benefit the weight determination and physical realism of the fault geometry. ? 2020 by the authors. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092528800&doi=10.3390%2fRS12193125&partnerID=40&md5=e4aca884eb337fff11cebfa28f766ff0 https://scholars.lib.ntu.edu.tw/handle/123456789/571648 |
ISSN: | 20724292 | DOI: | 10.3390/RS12193125 |
顯示於: | 地質科學系 |
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