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臺灣博碩士論文加值系統

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Author:紀宗志
Author (Eng.):Jung-jr Ji
Title:台灣嘉南地區Q值之分布
Advisor:歐國斌歐國斌 author reflink
advisor (eng):Gwo-Bin Ou
degree:Master
Institution:國立中正大學
Department:地震研究所暨應用地球物理研究所
Narrow Field:自然科學學門
Detailed Field:地球科學學類
Types of papers:Academic thesis/ dissertation
Graduated Academic Year:94
language:Chinese
number of pages:74
keyword (chi):Q值衰減波譜衰減法
keyword (eng):Qt*attenuation
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本文利用P波波譜衰減法來分析台灣嘉南地區之Q值變化。將嘉南地區分為12個區塊,並挑選地震分別探討深度於0~5公里、0~10公里、0~15公里和0~20公里等四種不同範圍之Q值。以震源深度在0~5公里的地震,計算12個區塊在0~5公里內的平均Q值。震源深度在5~10公里的地震資料,計算深度在0~10公里內的平均Q值,依此類推。進而推求各區塊分別於5~10公里、10~15公里和15~20公里的平均Q值。

由結果可以得知Q值受到地質影響甚大,各區塊的Q值大致隨深度增加而漸增。在淺部地層0~10公里內,Q值分佈由北北西向南南東遞增,與地表之地質構造非常吻合,深部地層10~20公里內Q值之分布則漸漸與地表構造線無關。
摘要…………………………………………………………………… Ⅰ
目錄…………………………………………………………………… Ⅱ
表目…………………………………………………………………… Ⅲ
圖目…………………………………………………………………… Ⅳ
第一章 緒論…………………………………………………………1
第二章 研究理論……………………………………………………4
2-1介質之品質因子(Q)…………………………………………4
2-2 波譜衰減法………………………………………………………5
第三章 資料選取與處理過程………………………………………8
3-1 資料選取…………………………………………………………8
3-2 P波波相截取……………………………………………………10
3-3 P波加速度頻譜…………………………………………………18
3-4 儀器響應………………………………………………………28
3-5振幅頻譜之線性迴歸……………………………………………28
3-6 Q值計算.………………………………………………………30
第四章 結果與討論………………………………………………37
4-1不同深度範圍的平均Q值………………………………………37
4-2結果之驗證………………………………………………………51
第五章 結論………………………………………………………64
參考文獻………………………………………………………………66
Brune, J. N. (1970). Tectonic stress and the spectra of seismic shear waves
from earthquakes, J. Geophys. Res. 75, 4997-5009.
Hanks, T.C. (1979). b-value and seismic source models: implications for
tectonic stress variations along active crustal fault zones and the
estimation of high-frequencv strong ground motion, J. Geophys. Res. 84, 2235-
2242.
Hough, S.E., J.G. Anderson, J. Brune, and F. Vernon (1988). Attenuation near
Anza, California, Bull. Seism. Soc. Am. 78, 672-691.
Kanamori, H. (1967). Spectrum of short-period core phases in relation to the
attenuation in the mantle, J. Geophys. Res. 72, 2181-2186.
Knopoff, L. (1964). Q, Rev. Geophys. 2, 625-660.
Mitchell, B. J. (1980). Frequency dependence of shear wave internal friction in
the continental crust of Eastern North America, J. Geophys. Res. 85,5212-5218.
歐國斌、蔡垂芬(1993). 台灣西南部地動估計(一): 與 關係之研究,行政院國家科學委員
會防災科技研究報告82-17號。
歐國斌(1994). 台灣西南部地動估計(二): 地殼參數和震源參數之研究,行政院國家科學委
員會專題研究計畫成果報告,NSC 83-0414-P-194-002-B。
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