EAR-PF: Seismological Investigations of Volcanic Eruptive Plumes

Ashley E. Shuler博士被授予美国国家科学基金会地球科学博士后奖学金，在加州大学圣克鲁斯分校开展研究和教育项目。该项目将通过评估Prejean和Brodsky[2011]方法中的假设，探索利用地震学作为遥感工具来估计火山灰柱高度的可能性，该方法将地震波与火山灰柱的最大高度联系起来。Shuler博士将研究共喷发地震震颤的源过程，并区分哪些喷发过程与地面良好耦合，并使用地震波进行测量。这项研究将确定1hz地震数据是否可以可靠地用于估计各种不同喷发类型的羽流高度。地震学还将用于计算一个以前无法测量的量——大规模喷发羽流内部的流速谱。这些结果将约束喷发柱的湍流结构。这项调查的结果可能直接适用于减轻火山爆发对航空业造成的危害。1hz数据的使用有可能彻底改变常用地震仪器的使用，并实现对偏远火山的近实时监测。这项研究将为博士后研究员和两名本科生提供多学科合作教育，这些学生与学术和火山监测社区都有联系。拟议工作的一个组成部分是阿拉斯加火山观测站的公共教育和宣传，该观测站是该项目的机构合作伙伴。

Dr. Ashley E. Shuler has been awarded an NSF Earth Science Postdoctoral Fellowship to carry out a research and education program at the University of California Santa Cruz. The project will explore the possibility of using seismology as remote sensing tool to estimate height of volcanic ash columns, by evaluating assumptions in the Prejean and Brodsky [2011] method, that relates seismic waves to maximum heights of ash columns. Dr. Shuler will investigate the source process(es) of co-eruptive seismic tremor and distinguish which eruptive processes are well-coupled to the ground and measurable using seismic waves. This study will determine whether 1 Hz seismic data can reliably be used to estimate plume heights for a variety of different eruption types. Seismology will also be used to calculate a previously unmeasurable quantity - the spectrum of flow velocities inside large-scale eruptive plumes. These results will constrain the turbulence structure of eruption columns.The results from this investigation may have direct applicability to mitigating hazards posed to the aviation industry by explosive volcanic eruptions. The use of 1 Hz data has the potential to revolutionize the use of commonly deployed seismic instruments and enable near real-time monitoring of remote volcanoes. This study will provide a multidisciplinary, collaborative education for the post-doctoral fellow and two undergraduate students linked to both the academic and volcano monitoring communities. An integral component of the proposed work is public education and outreach at Alaska Volcano Observatory, an institutional partner for this project.