EAR-PF: Investigations of Ambient Seismic Noise

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。Moira Pyle博士被授予NSF地球科学博士后奖学金，在圣刘易斯大学开展研究和教育计划。本项目旨在提高我们对周围地震噪声产生的理解，并探索利用地震噪声研究地球内部的新方法。将对两个地震台站阵列之间的噪声进行互相关，并将采用阵列分析技术调查存在何种相干能量。数据将来自国际监测系统的永久阵列以及现有的临时阵列部署。不同的季节和年份将被检查，以研究噪音产生的季节和时间差异。地球内部的地震遥感通常使用由地震或诸如爆炸的人造源产生的波，然而，最近已经开发了使用包含在环境地震噪声中的表面波信息来检查地球结构的方法。噪音也包含与地球深部相互作用的体波能量的证据提供了一个利用噪音来研究地球更多部分的机会。利用噪音来研究地球大范围的能力将允许更好的全球覆盖，因为它可以帮助减少地震发生的位置和时间的限制。拟议的研究将为本科生提供一个机会，参加一个研究项目，并探讨在地球物理学的兴趣，同时发展研究技能非常有用的进一步研究。主要研究者将获得宝贵的指导经验，与本科生一起工作，并通过为研究生物理学课程提供讲座来分享该项目的方法和相关工作。将向来访的学校团体介绍该项目背后的想法和基本地震学的简化解释。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Dr. Moira Pyle is awarded an NSF Earth Science Postdoctoral Fellowship to carry out a program of research and education at Saint Louis University. This project seeks to improve our understanding of the generation of ambient seismic noise and to explore new methods of utilizing seismic noise to study the interior of the earth. Crosscorrelation of noise between two arrays of seismic stations will be performed and array analysis techniques will be employed to investigate what coherent energy exists. Data will come from the permanent arrays of the International Monitoring System as well as available temporary array deployments. Different seasons as well as years will be examined to study the seasonal and temporal differences in noise generation. Seismic remote sensing of the interior of the earth typically uses waves generated by earthquakes or man made sources such as explosions, however, a method using surface wave information contained in ambient seismic noise has recently been developed to examine Earth structure. Evidence that the noise also contains body wave energy that has interacted with the deep earth provides an opportunity to use noise to examine even more of the earth. The ability to use noise to study a wide range of the earth will allow for far better global coverage because it can help reduce the limitations of location and timing of earthquake occurrence. The proposed study will provide an opportunity for an undergraduate student to participate in a research project and explore interest in geophysics while developing research skills extremely useful for further study. The principal investigator will gain valuable mentoring experience working with undergraduates as well as sharing the methods and related work from the project by contributing lectures to graduate geophysics courses. Simplified explanations of the ideas behind the project and basic seismology will be presented to visiting school groups.