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題 名 | 以有限維度震源法決定地震破裂面:1998年嘉義瑞里地震序列為例=The Determination of Earthquake's Rupture Plane by Finite Dimension Source Method: Examination by Using Ruili, Chiayi Earthquake Sequence in 1998 as the Example |
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作 者 | 陳榮裕; 高弘; 張建興; | 書刊名 | 氣象學報 |
卷 期 | 48:3 2011.09[民100.09] |
頁 次 | 頁15-42 |
分類號 | 354.4 |
關鍵詞 | 破裂面; 震源機制解; 中央地震矩張量; Rupture plane; Focal mechanism; Centroid moment tensor; |
語 文 | 中文(Chinese) |
中文摘要 | 本文主旨在運用距離地震震央較近之近場(Near-field)強震地震波形, 取用已知雙力偶地震破裂參數之2組地震震源機制解,藉由地震破裂面與地 震測站間之空間幾何分布差異,以合成地震波形與觀測地震波形吻合度之比 較,判斷何者為地震斷層面。其中吻合度較佳者為地震斷層破裂面,而另1 組為地震斷層輔助(截)面。希望藉由本研究方法能夠精確了解地震斷層破裂 面之幾何位置,辨識發震構造特性,並藉此很清楚找出地震序列發震構造幾 何型態,以提供地震發震地區更詳盡之地震構造資訊。本研究以1998年7月 17日嘉義瑞里地震序列之主震為例,取用中央研究院地球科學研究所臺灣 地區寬頻地震觀測網(BATS),以波形反演之2組震源機制解(CMT),得到之 斷層破裂面參數為方位角(strike)340°,傾角(dip)32°,滑移角(slip)36°。結 果與餘震分布之走向及地質構造特性非常吻合,證明本研究方法之準確性, 並可以提供其他地震做為相關震源特性之研究。 |
英文摘要 | The purpose of this study uses near-field strong motion earthquake waveforms to determinate earthquake’s rupture plane from double couple source parameters. By differences in the space geometry distributions between sub-sources and recorders, we compared the observation data with two synthetic waveforms in order to identify the rupture plane which has the minimum misfit and the other is nodal plane. Structure with the geometry of seismogenic is expected to be found through this research method and also more concreted information of source parameters can be provided. The main shock for the example of earthquake sequence in this study occurred in Ruili, Chiayi on July 17, 1998. The focal mechanisms are obtained from CMT by Broadband Array in Taiwan for Seismology(BATS) of Institute of Earth Sciences, Academia Sinica. We obtained the source parameters of rupture plane as strike 340°, dip 32°, slip 36°. The trends of our result and the aftershocks distribution of earthquake sequence and geological structure characteristics were quite identical, which has proved the accuracy of this research approach, and it can be applied to other earthquakes research with relevant focus characteristics. |
本系統中英文摘要資訊取自各篇刊載內容。