Japan Long-Term Research Visit: Earthquake Potential of Folds in Japan

该奖项将支持俄勒冈州立大学地球科学系Robert Yeats教授长期访问日本，与日本筑波地质调查局地震构造研究部的Yoshi Kinugaso博士进行合作研究项目。本研究将包括对发震盲冲断层的识别和评价。发生在褶皱带的地震可以通过地表地质、地下测井和地震线进行研究，特别是那些发生在产油区的地震。近年来，人们对褶皱、断层和地震发生之间的联系有了更好的了解，部分原因是人们越来越意识到断层传播褶皱系统在加州人口密集地区造成的极端危害。研究将包括对地震断层的结构方面的研究，这些断层不切割地表，而是由区域尺度的褶皱容纳。这项研究的结果有可能扩大美国地表以褶皱形式表示的发震带数据库。此外，通过考虑断层和褶皱分割的可能性以及滑动速率，可以为约束地震大小提供可能性。日本地质调查局（Geological Survey of Japan）以其在评估地表断层的地震风险方面的持续研究而闻名。他们的专业知识，加上叶芝教授在盲断层地震风险领域的专业知识，应该会提供富有成效的合作。预计这一合作努力将在正式协议终止后继续进行。

This award will support a long-term visit by Professor Robert Yeats, Department of Geosciences, Oregon State University, to Japan for a cooperative research project with Dr. Yoshi Kinugaso of the Seismotectonic Research Division at the Geological Survey of Japan in Tsukuba. The Research will include a study of the recognition and evaluation of seismogenic blind thrusts. Earthquakes that occur in fold belts can be studied using surface geology and subsurface well logs and seismic lines, particularly those that occur in petroleum-producing regions. A better understanding of the tie between folds, faults and seismegenesis in recent years is partly the result of a growing awareness of the extreme hazards posed by fault propagation fold systems in highly populated regions of California. Research will include a study of the structural aspects of earthquake faults that do not cut the surface but instead appear to be accommodated by regional-scale folding. Results of the research have the potential of broadening U.S. databases on seismogenic zones expressed at the surface as folds. Additionally, the research could lead to the possibility of constraining earthquake size by considering the possibility of fault and fold segmentation as well as slip rate. The Geological Survey of Japan is well known for their ongoing research in the area of evaluating seismic risks from surface faulting. Their expertise, coupled with Professor Yeats' expertise in the area of seismic risks from blind faults, should provide a fruitful collaboration. It is expected that this collaborative effort will continue after the formal agreement has terminated.