دورية أكاديمية
Quasi-spherical approach for seismic wave modeling in a 2-D slice of a global Earth model with lateral heterogeneity
| العنوان: | Quasi-spherical approach for seismic wave modeling in a 2-D slice of a global Earth model with lateral heterogeneity |
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| المؤلفون: | Toyokuni, G, Takenaka, Hiroshi, Wang, Yanbin, Kennett, Brian |
| المصدر: | Geophysical Research Letters |
| بيانات النشر: | American Geophysical Union |
| المجموعة: | Australian National University: ANU Digital Collections |
| مصطلحات موضوعية: | Keywords: Computational methods, Earth sciences, Finite difference method, Geometry, Iterative methods, Mathematical models, Seismology, Three dimensional, Two dimensional, Wave propagation, Earth model, Seismograms, Spherical coordinates, Subduction zones, Seismic |
| الوصف: | For iterative calculations of synthetic seismograms with limited computer resources, a fast and accurate modeling method is needed. Axisymmetric modeling has often been used in global seismology to restrict computational time and storage. This approach can correctly model 3-D geometrical spreading effects with computational times comparable to 2-D methods, but cannot treat asymmetric structures about the source axis. To overcome this problem, a new approach is proposed for seismic wave propagation in a 2-D slice through a global Earth model with lateral heterogeneity. The elastodynamic equation for spherical coordinates is not solved in the conventional spherical domain but instead in the "quasi-spherical domain" using the finite-difference method. The validity and efficiency of this technique is illustrated with numerical examples including subduction zone structures. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| تدمد: | 0094-8276 |
| العلاقة: | http://hdl.handle.net/1885/81556Test; https://openresearch-repository.anu.edu.au/bitstream/1885/81556/5/MigratedxPub9832_2005.pdf.jpgTest; https://openresearch-repository.anu.edu.au/bitstream/1885/81556/7/01_Toyokuni_Quasi-spherical_approach_for_2005.pdf.jpgTest |
| DOI: | 10.1029/2004GL022180 |
| الإتاحة: | https://doi.org/10.1029/2004GL022180Test http://hdl.handle.net/1885/81556Test https://openresearch-repository.anu.edu.au/bitstream/1885/81556/5/MigratedxPub9832_2005.pdf.jpgTest https://openresearch-repository.anu.edu.au/bitstream/1885/81556/7/01_Toyokuni_Quasi-spherical_approach_for_2005.pdf.jpgTest |
| رقم الانضمام: | edsbas.55560384 |
| قاعدة البيانات: | BASE |
| تدمد: | 00948276 |
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| DOI: | 10.1029/2004GL022180 |