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

题目：北安那托利亚断层Karadere-Duzce分支深度1的几何和地震性质的高分辨率成像；这项研究将对北安那托利亚断层的Karadere-Duzce分支进行全面的高分辨率成像，使用在1999年8月17日Mw7.4地震后5.5个月里由RAMP pascal地震台网收集的Karadere-Duzce断裂带沿线和周围的近断层地震数据。研究区横跨1999年8月17日和11月12日的7+断裂的重要构造东端和西端。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)断裂破坏物质在深部的几种可能的地震特征，包括各向异性、非线性波传播、断裂带困波和头波效应；(3)记录地震活动的高分辨率震源位置。研究目标是：1)提供断裂带深度宽度、连续性和地震性质的高分辨率成像；2)建立(a)地表岩性与断层偏移的相关性，(b)大地震破裂的时空模式，(c)深部微震活动模式，(d)各种地震信号成像的深部受损断裂带岩石性质。研究结果将有助于更好地理解大变形板块边界断裂带的性质和力学。所开发的综合方法可用于其他故障系统的研究。

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.