Precursory small earthquake migration patterns

NCU Institutional Repository > 地球科學學院 > 地球物理研究所 > 期刊論文 > Item 987654321/50579

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/50579

題名:	Precursory small earthquake migration patterns
作者:	Wu,YH;Chen,CC;Rundle,JB
貢獻者:	地球物理研究所
關鍵詞:	1999 CHI-CHI;ACCELERATING SEISMICITY;THRESHOLD SYSTEMS;CRITICAL-POINT;CRACK-TIP;NUCLEATION;DYNAMICS;TAIWAN;CALIFORNIA;EVENTS
日期:	2011
上傳時間:	2012-03-27 17:37:14 (UTC+8)
出版者:	國立中央大學
摘要:	Seismic precursors revealed by statistical physics methods are important for earthquake forecasting and helpful for understanding fault behaviour. One of the precursors, earthquake migration, has been observed in simulated models and rock experiments, as well as anecdotal observations for large earthquakes along major fault zones. However, there has been no systematic methodology for investigating earthquake migration in nature, and only a small number of studies have observed earthquake migration at large scales. In this work, we show that migration of small earthquakes towards the epicentre before large earthquakes can be visualized. We present a method for detecting small earthquake migration in the spatiotemporal domain, and retrospectively apply it to two recent examples of major earthquakes in Taiwan. We observe that anomalous seismicity occurs increasingly close to the epicentre as the occurrence time is approached. At that point, the bulk of the seismicity concentrates on the epicentre, accumulating stress on the rupture zone and leading to the full rupture. Our findings imply a new type of large-scale pre-seismic earthquake migration pattern that is complementary to the well-studied patterns of source-region activation and quiescence.
關聯:	TERRA NOVA
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	835	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.....