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

这一奖项将支持俄勒冈州立大学地球科学系罗伯特·叶芝教授长期访问日本，与筑波日本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。该研究将包括对孕震盲冲的识别和评价的研究。发生在褶皱带的地震可以利用地表地质学、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、断层和地震成因之间的联系有了更好的理解，这在一定程度上是因为人们越来越意识到加州人口稠密地区的断层传播褶皱系统构成的极端危险。研究将包括对地震断层的结构方面的研究，这些断层不会切割地表，而是似乎被区域规模的褶皱所容纳。这项研究的结果有可能扩大美国关于地震孕育区的数据库，这些数据库在地表用褶皱表示。此外，这项研究可能导致通过考虑断层和褶皱分段以及滑移率的可能性来限制地震规模的可能性。日本地质调查局以其在评估地表断层引起的地震风险领域的持续研究而闻名。他们的专业知识，加上叶芝教授在盲目断层的地震风险领域的专业知识，应该会提供富有成效的合作。预计在正式协议终止后，这一合作努力将继续下去。

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.