SGER: A Pilot Study on Imaging Bimaterial Interfaces Along the North Anatolian Fault With Fault Zone Head Waves

拟议的试点研究是与记录微震和断层带波形沿着一段北安纳托利亚断层，在M=7.3 1944年地震破裂，部分蠕动。其主要目标是成像断层带结构中的双材料界面，并在较小程度上也澄清沿该断层沿着的微震活动模式。首波的分析将为基于北安纳托利亚断层破坏不对称性的详细地质观测的研究区域的速度对比的预测意义提供测试。结果将有助于发展对长期演化的更好理解，北安纳托利亚断层的内部组织和地震潜力。大断层对于像伊斯坦布尔、圣弗朗西斯科和洛杉矶这样的大都市地区的地震震动危险的估计具有深远的影响。分析记录的局部微震活动模式将有助于理解大型大陆走滑断层的蠕动段。这项研究将与土耳其伊斯坦布尔坎迪利天文台的Mustafa Aktar教授小组合作进行，并将成为南加州大学研究生和坎迪利学生/研究员教育的一部分。该SGER由国际科学与工程办公室，ANESA计划和GEO/GEO地球物理计划共同资助。

The proposed pilot study is associated with recording microseismicity and fault zone waveforms along a section of the North Anatolian fault that ruptured in the M=7.3 1944 earthquake and is partially creeping. The main goals are to image bimaterial interfaces in the fault zone structure, and to a lesser extent also to clarify the microseismicity patterns along that section of the fault. The analysis of head waves will provide a test for the predicted sense of the velocity contrast across the study area based on the detailed geological observations of damage asymmetry across the North Anatolian fault.The results will contribute to developing improved understanding of the long-term evolution, internal organization and seismic potential of the North Anatolian fault.The issue of possible statistical preference of earthquake propagation directions on large faults can have profound implications for estimates of seismic shaking hazard in large metropolitan areas like Istanbul, San Francisco and Los Angeles. Analysis of the recorded local microseismicity patterns will contribute to the understanding of creeping sections of large continental strike-slip faults. The study will be done in collaboration with the group of Prof. Mustafa Aktar from the Kandilli Observatory in Istanbul, Turkey, and will form parts of the education of USC graduate student and Kandilli student/researcher. This SGER is jointly funded by the Office of International Science and Engineering, ANESA program, and the Geophysics program in GEO/EAR.