Accomplishment Based Renewal: Temporal Evolution of Hydrothermal and Volcanic Processes at the East Pacific Rise From Microearthquake Data

基于成就的更新：微地震数据引起的东太平洋热液和火山过程的时间演化

• 批准号: 0961594
• 负责人: Maya Tolstoy
• 金额: $ 44.82万
• 依托单位: Columbia University
• 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 2016-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0961594&HistoricalAwards=false
• 关键词: Accomplishment; Based; Renewal; Temporal; Evolution

Recent work has shown that micro earthquake studies can contribute significantly to understanding a variety of processes that occur on mid ocean ridges. From October 2003 to January 2007 an array of Ocean Bottom Seismometers (OBSs) recorded ~320,000 microearthquakes near 9°50?N on the East Pacific Rise (EPR). To date this project has been very successful; it has led to several important discoveries, and it has produced 10 scientific papers, two of which have appeared in the most prestigious journals, Science and Nature. Tolstoy?s work has also been featured in the NSF annual report to Congress. This project has also spawned research in related disciplines. The EPR OBS experiment recorded around two orders of magnitude more earthquakes than had been expected and renewal funding will enable continued analysis of these data; specifically, studying temporal trends in the structures inferred from the earthquakes; analyzing source processes, focal mechanisms and variations in the stress field before, during and after the eruption; examining data for seismic evidence that eruptive activity occurred in the 6 months prior to the main seismic crisis (January 22, 2006) as implied by radiometric dating. Among the broader impacts of this project are a vigorous public outreach program, support for a graduate student and support for a highly productive female investigator.

最近的工作表明，微地震研究可以大大有助于了解发生在大洋中脊的各种过程。从2003年10月到2007年1月，海底地震仪（OBS）阵列记录了约320，000次9°50？东太平洋海隆（EPR）到目前为止，这个项目非常成功;它导致了几个重要的发现，并产生了10篇科学论文，其中两篇发表在最负盛名的期刊《科学》和《自然》上。托尔斯泰？美国国家科学基金会提交给国会的年度报告中也提到了这项工作。该项目还引发了相关学科的研究。EPR OBS实验记录的地震比预期的多两个数量级，续供资金将使这些数据能够继续分析;具体而言，研究从地震推断的结构的时间趋势;分析震源过程、震源机制和爆发前、爆发期间和爆发后应力场的变化;检查地震证据的数据，火山喷发活动发生在6个月前的主要地震危机（2006年1月22日），如辐射测年所暗示的。该项目更广泛的影响包括强有力的公共外展计划、对研究生的支持以及对高效女性调查员的支持。