Validation of the rupture properties of the 2001 Kunlun, China (M-s=8.1), earthquake from seismological and geological observations

NCU Institutional Repository > 地球科學學院 > 地球物理研究所 > 期刊論文 > Item 987654321/27578

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27578

題名:	Validation of the rupture properties of the 2001 Kunlun, China (M-s=8.1), earthquake from seismological and geological observations
作者:	Wen,YY;Ma,KF;Song,TRA;Mooney,WD
貢獻者:	地球物理研究所
關鍵詞:	KOKOXILI-EARTHQUAKE;SUPERSHEAR RUPTURE;SLIP-DISTRIBUTION;CRUSTAL STRUCTURE;TIBETAN PLATEAU;SUB-RAYLEIGH;FAULT;GROWTH;DEFORMATION;OFFSETS
日期:	2009
上傳時間:	2010-06-29 18:41:14 (UTC+8)
出版者:	中央大學
摘要:	We determine the finite-fault slip distribution of the 2001 Kunlun earthquake (M-s = 8.1) by inverting teleseismic waveforms, as constrained by geological and remote sensing field observations. The spatial slip distribution along the 400-km-long fault was divided into five segments in accordance with geological observations. Forward modelling of regional surface waves was performed to estimate the variation of the speed of rupture propagation during faulting. For our modelling, the regional 1-D velocity structure was carefully constructed for each of six regional seismic stations using three events with magnitudes of 5.1-5.4 distributed along the ruptured portion of the Kunlun fault. Our result shows that the average rupture velocity is about 3.6 km s(-1), consistent with teleseismic long period wave modelling. The initial rupture was almost purely strike-slip with a rupture velocity of 1.9 km s(-1), increasing to 3.5 km s(-1) in the second fault segment, and reaching a rupture velocity of about 6 km s(-1) in the third segment and the fourth segment, where the maximum surface offset, with a broad fault zone, was observed. The rupture velocity decelerated to a value of 3.3 km s(-1) in the fifth and final segment. Coseismic slip on the fault was concentrated between the surface and a depth of about 10 km. We infer that significant variations in rupture velocity and the observed fault segmentation are indicative of variations in strength along the interface of the Kunlun fault, as well as variations in fault geometry.
關聯:	GEOPHYSICAL JOURNAL INTERNATIONAL
顯示於類別:	[地球物理研究所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	503	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....