Seismicity pattern changes prior to large earthquakes - An approach of   the RTL algorithm

CORC > 北京大学 > 地球与空间科学学院

	Seismicity pattern changes prior to large earthquakes - An approach of the RTL algorithm
	Huang, QH
刊名	terrestrial atmospheric and oceanic sciences
	2004
关键词	seismicity seismic quiescence seismic activation earthquake swarm RTL algorithm. IZMIT EARTHQUAKE QUIESCENCE JAPAN MIGRATION CATALOGS CANNOT GAPS
英文摘要	A statistical method, which is called the Region-Time-Length (RTL) algorithm and takes into account information such as magnitude, occurrence time and place of earthquakes, was applied to earthquake data to investigate seismicity pattern changes prior to large earthquakes. Based on the RTL algorithm and some newly developed parameters such as the Q-parameter (average of the RTL values over some time window) and S-parameter (an index of seismic activation), I quantified both the temporal and spatial characteristics of seismicity pattern changes in various tectonic regions. The results indicated that seismic quiescence anomalies generally started a few years before the occurrence of the earthquakes and lasted from 1 to 2.5 years. The duration of the subsequent stage of seismic activation generally lasted several months. The linear dimension of the quiescence zone reached a few hundred kilometers (several times the rupture dimension of the mainshock), while the activation zone was generally in order of several tens of kilometers (comparable to the rupture dimension). An earthquake is most likely to occur once the relevant source region has passed through the quiescence and activation stages. Close investigation of possible artifacts due to the selection of model parameters and the changes of seismological networks are important in identifying real seismicity changes from man-made ones. Further stochastic testing using random earthquake catalogs was also done and it supports that the anomalies revealed in my works are significant. Besides studying on seismicity changes before large earthquakes, I also performed the first test of the above statistical method for investigating seismicity changes of earthquake swarms. It indicated that an increased RTL parameter would be a new potentially useful index for the risk alarm of earthquake swarms.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000225540800011&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences; Oceanography; SCI(E); 26; ARTICLE; 3; 469-491; 15
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/311398]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Huang, QH. Seismicity pattern changes prior to large earthquakes - An approach of the RTL algorithm[J]. terrestrial atmospheric and oceanic sciences,2004.
APA	Huang, QH.(2004).Seismicity pattern changes prior to large earthquakes - An approach of the RTL algorithm.terrestrial atmospheric and oceanic sciences.
MLA	Huang, QH."Seismicity pattern changes prior to large earthquakes - An approach of the RTL algorithm".terrestrial atmospheric and oceanic sciences (2004).