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題 名 | Synthetic Seismogram for the Velocity and Attenuation Structure Near the Inner-outer Core Boundary Using the Generalized Ray Method=以廣義射線法合成地震圖推求內外核界面處之速度與震波衰減構造 |
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作 者 | 黃柏壽; 姚振興; 葉永田; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷 期 | 9:2 1998.06[民87.06] |
頁 次 | 頁287-300 |
分類號 | 354.4 |
關鍵詞 | 廣義射線法合成地震圖; 推求內外核界面處; 速度; 震波; Generalized ray method; Synthetic seismogram; Inner-core boundary; Attenuation; |
語 文 | 英文(English) |
英文摘要 | Synthetic seismograms for seismic waves penetrating near the inner-outer core boundary are implemented using the generalized ray method. The model takes into account the detailed velocity jump near the inner-outer core boundary and the possible depth dependent attenuation of the inner core. The source-side surface reflections, considered as the later phases of the observed seismograms, are included in the model. The program developed in this study is suitable for the modeling of shallow and intermediate deep events along the major seismic zones and the mid-ocean ridges. These areas provide good global coverage of ray paths for studying the structure of the earth's core in detail. Numerical modeling in this study shows that the source-side surface reflections of the core phases make a significant contribution to determining the core velocity structure for the observations of the spatial-dense array with small aperture. Additionally, the possible depth dependent inner-core attenuation can be resolved from regional array seismograms. The results of this study show that the newly developed generalized ray code displays a high potential for further elucidating the earth's core structure using the available data. |
本系統中英文摘要資訊取自各篇刊載內容。