Probabilistic Earthquake Hazard in Metropolitan Taipei and Its Surrounding Regions

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50590

Title:	Probabilistic Earthquake Hazard in Metropolitan Taipei and Its Surrounding Regions
Authors:	Cheng,CT;Lee,CT;Lin,PS;Lin,BS;Tsai,YB;Chiou,SJ
Contributors:	應用地質研究所
Keywords:	SEISMIC RISK ANALYSIS;CHI-CHI EARTHQUAKE;NORTHERN TAIWAN;FAULT;VELOCITY;MODEL;AREA;ARC
Date:	2010
Issue Date:	2012-03-27 17:37:25 (UTC+8)
Publisher:	國立中央大學
Abstract:	The aim of this study is to evaluate the probability of seismic hazard for the Taipei metropolitan area in northern Taiwan from readily available information, including the attenuation relationship of peak ground acceleration (PGA), tectonic settings, fault-slip data, and seismicity. The PGA seismic hazard mapping reveals that the hazard level in this area increases going from northwest to southeast and southwest. There are four important earthquake sources that contribute to the hazard level: (1) the plate-boundary interface (subduction zone interface) located offshore of the Ilan plain; (2) the intraslab subduction zone underneath Taipei itself: (3) the crustal areal sources in eastern Taiwan and central Taiwan. and (4) the nearby active Shanchiao fault. The slip-rate of the targeted fault is relatively low, and therefore not the most dangerous earthquake source revealed in the 475-year return period. However, there is no doubt that the target fault is the control source in the 2475-year return period Furthermore, higher PGAs are predicted using the attenuation relationship of subduction zone earthquake sources rather than crustal earthquake sources, meaning an increase of the seismic hazard level over previous estimates. Consequently, more attention needs to be paid to subduction zone sources when considering mitigation of seismic hazards in northern Taiwan.
Relation:	TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
Appears in Collections:	[Graduate Institute of Applied Geology] journal & Dissertation

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