Sensitivity of earthquake cycles on the San Andreas fault to small   changes in regional compression

doi:10.1038/40601

CORC > 北京大学 > 地球与空间科学学院

	Sensitivity of earthquake cycles on the San Andreas fault to small changes in regional compression
	Wang, CY ; Cai, YG
刊名	nature
	1997
关键词	CALIFORNIA COAST-RANGES PLATE MOTIONS FRANCISCO BAY STRESS STATE
DOI	10.1038/40601
英文摘要	The current pattern of slip(1,2) within the San Andreas fault system in the San Francisco Bay area is distinctly different from the long-term slip pattern inferred from the geological record(3,4). This difference is not surprising because geological data record the accumulated displacements over many earthquake cycles, whereas geodetic data reveal the present-day slip pattern. It is not known, however, what mechanism triggers the change from the 'interseismic' slip pattern (when the San Andreas fault is locked) to the 'co-seismic' slip pattern (when the San Andreas fault ruptures in earthquake slip). Here we use numerical simulations of the entire seismic cycle on this complex fault system to show that the San Andreas fault may be in a critical state and sensitive to small perturbations in regional compression. In particular, we find that small increases in regional compression may lock the San Andreas fault, whereas small decreases in regional compression may release the locked segment and so permit co-seismic slip. This sensitivity suggests that cyclic changes in the regional stress field resulting from plate convergence and thrust faulting in the Coast Ranges could trigger major earthquakes on the San Andreas fault.; Multidisciplinary Sciences; SCI(E); 5; ARTICLE; 6638; 158-161; 388
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/402041]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, CY,Cai, YG. Sensitivity of earthquake cycles on the San Andreas fault to small changes in regional compression[J]. nature,1997.
APA	Wang, CY,&Cai, YG.(1997).Sensitivity of earthquake cycles on the San Andreas fault to small changes in regional compression.nature.
MLA	Wang, CY,et al."Sensitivity of earthquake cycles on the San Andreas fault to small changes in regional compression".nature (1997).