High Resolution Imaging of the Geometry and Seismic Properties of the Karadere-Duzce Branch of the North Anotolian Fault at Depth

EAR 0003401（PH #41 x）提案摘要标题：深度PI的北安纳托利亚断层Karadere-Duzce分支的几何形状和地震特性的高分辨率成像：Y。Ben-Zion和D. Okaya，南加州大学这项研究将进行一个全面的高分辨率成像的Karadere-Duzce分支的北安纳托利亚断层，使用近断层地震数据收集沿着和周围的Karadere-Duzce破裂带在5.5个月后的Mw7.4 1999年8月17日，地震的RAMP PASSCAL地震网络。研究区域横跨1999年8月17日和11月12日M7+断裂的结构重要的东端和西端。研究将包括分析、解释和整合来自以下研究类别的信息：（1）使用地震走时层析成像的区域成像;（2）深度受损断层带物质的几种可能的地震特征，包括各向异性、非线性波传播、断层带陷波和首波效应;以及（3）记录地震活动的高分辨率震源位置。研究的目标是：1）提供断层带在深度处的宽度、连续性和地震特性的高分辨率成像;以及2）建立（a）地表处的岩性和断层偏移、（B）大地震破裂的时空模式、（c）深度处的微震活动性模式、以及（d）由各种地震信号成像的深度处的受损断层带岩石的特性之间的相关性。研究结果将有助于更好地了解主要转换板块边界断裂带的性质和力学机制。开发的集成方法将是有用的应用程序到其他故障系统。

Abstract for proposal EAR0003401 (PH # 41x)Title: High Resolution Imaging of the Geometry and Seismic Properties of the Karadere-Duzce Branch of the North Anatolian Fault at DepthPI's: Y. Ben-Zion and D. Okaya, University of Southern CaliforniaThis research will conduct a comprehensive high resolution imaging of the Karadere-Duzce branch of the North Anatolia Fault, using near-fault seismic data collected along and around the Karadere-Duzce rupture zone during the 5.5 months following the Mw7.4 August 17, 1999, earthquake by a RAMP PASSCAL seismic network. The study area straddles the structurally important eastern and western ends of the August 17 and November 12, 1999, M 7+ ruptures. Research will include analysis, interpretation, and integration of information from the following categories of studies: (1) regional imaging using earthquake travel time tomography; (2) several possible seismic signatures of damaged fault zone material at depth including anisotropy, non-linear wave propagation, and fault zone trapped and head waves effects; and (3) high-resolution hypocenter locations of recorded seismicity. Goals of the research are: 1) providing high resolution imaging of width, continuity, and seismic properties of the fault zone at depth; and 2) establishing correlations between (a) lithology and fault offsets at the surface, (b) space-time patterns of large earthquake ruptures, (c) microseismicity patterns at depth, and (d) properties of damaged fault zone rock at depth as imaged by various seismic signals. Results of the research will contribute to a better understanding of properties and mechanics of major transform plate-boundary fault zones. The developed integrated methodology will be useful for applications to other fault systems.