EAR-PF: Geologic Age Constraints for Seismic Hazard Assessment of Critical National Infrastructure

EAR-PF：国家重要基础设施地震灾害评估的地质年龄限制

• 批准号: 0948350
• 负责人: Dylan Rood
• 金额: $ 17万
• 依托单位: Rood Dylan H
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0948350&HistoricalAwards=false
• 关键词: EAR; PF; Geologic; Age; Constraints

Dr. Dylan Rood has been awarded an NSF Earth Sciences Postdoctoral Fellowship to carry out a research and education plan at the University of California, Irvine. This work will develop a transformational new tool for earthquake hazard analysis. The goal of this investigation is to produce a dataset of exposure ages for well-characterized geologic features (precariously balanced rocks, PBRs) using in-situ produced cosmogenic isotopes (10Be). Successful dating of PBRs will allow ground motions from ancient earthquakes to be constrained over timescales for which observational data do not exist. This chronology will be synthesized with physics-based unexceeded ground motion estimates for each PBR and compared to existing hazard maps. The results will validate ground motion models and significantly reduce uncertainty in earthquake hazard estimates, in turn, providing a firm scientific basis for probabilistic seismic hazard assessment.PBRs have potential to be applied to seismic hazard analysis for a wide range of the nation's critical infrastructure (e.g. buildings, bridges, dams, etc.). Specifically, improved seismic hazard analysis would greatly assist government regulators in successfully licensing sensitive structures (e.g. nuclear power plants). This project will also support the career development of a young scientist through mentorship and teaching experience. Each year the fellow will teach Natural Disasters, a general education course at University of California, Irvine. Course topics include geologic hazards, including earthquakes and major climate changes. This research and teaching strategy will help prepare the fellow for a career as a scientist and educator in the Earth sciences.

Dylan Rood 博士获得了美国国家科学基金会地球科学博士后奖学金，在加州大学欧文分校开展研究和教育计划。这项工作将开发一种用于地震灾害分析的变革性新工具。这项研究的目标是使用原位产生的宇宙成因同位素 (10Be) 生成明确地质特征（不稳定平衡岩石，PBR）的暴露年龄数据集。成功地对 PBR 进行测年将能够在不存在观测数据的时间尺度上限制古代地震产生的地面运动。该年表将与每个 PBR 的基于物理的未超出的地面运动估计进行综合，并与现有的危险地图进行比较。结果将验证地面运动模型并显着减少地震灾害估计的不确定性，从而为概率性地震灾害评估提供坚实的科学基础。PBR 有潜力应用于国家广泛的关键基础设施的地震灾害分析（例如建筑物、桥梁、水坝等）。具体来说，改进的地震危险性分析将极大地帮助政府监管机构成功地为敏感结构（例如核电站）颁发许可。该项目还将通过指导和教学经验支持年轻科学家的职业发展。每年，该研究员都会在加州大学欧文分校教授自然灾害，这是一门通识教育课程。课程主题包括地质灾害，包括地震和重大气候变化。这项研究和教学策略将有助于该研究员为地球科学领域的科学家和教育家的职业生涯做好准备。