Seismicity changes associated with the 2000 earthquake swarm in the Izu   Island region

doi:10.1016/j.jseaes.2004.11.005

CORC > 北京大学 > 地球与空间科学学院

	Seismicity changes associated with the 2000 earthquake swarm in the Izu Island region
	Huang, Qinghua
刊名	journal of asian earth sciences
	2006
关键词	earthquake swarm seismicity changes seismic quiescence accelerated seismicity Izu Island region IZMIT EARTHQUAKE KOBE EARTHQUAKE JAPAN QUIESCENCE
DOI	10.1016/j.jseaes.2004.11.005
英文摘要	A statistical method taking into account the information of magnitude, occurrence time and location of earthquakes was applied to the 191 earthquake data (1977-2000) of the Japan Meteorological Agency (JMA) to investigate seismicity changes in the Izu Island region. The analysis indicated that a quiescence anomaly started about 1.5 years before the occurrence of the largest swarm in the summer of 2000 in the Izu Island region. Close investigations of the possible artifacts due to the selection of model parameters and the improvement of the seismological network lead to the conclusion that the above quiescence anomaly is unlikely a man-made change. The further stochastic test using 1000 random earthquake catalogs supports the idea that the above anomaly is significant. The spatial distribution of the seismic quiescence, which is quantified by a newly developed Q-parameter, revealed a clear anomalous region around the epicentral area of the above earthquake swarm. The seismicity revealed by the normalized parameter tends to increase just before the swarm. As the first test of the above statistical method for investigating seismicity changes of earthquake swarms, this study indicates that the increased RTL parameter would be a new potentially useful index for the risk alarm of earthquake swarms. (C) 2004 Elsevier Ltd. All rights reserved.; Geosciences, Multidisciplinary; SCI(E); 10; ARTICLE; 5; 509-517; 26
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/156046]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Huang, Qinghua. Seismicity changes associated with the 2000 earthquake swarm in the Izu Island region[J]. journal of asian earth sciences,2006.
APA	Huang, Qinghua.(2006).Seismicity changes associated with the 2000 earthquake swarm in the Izu Island region.journal of asian earth sciences.
MLA	Huang, Qinghua."Seismicity changes associated with the 2000 earthquake swarm in the Izu Island region".journal of asian earth sciences (2006).