Community Facility Support: The Global CMT Project

社区设施支持：全球 CMT 项目

• 批准号: 1936254
• 负责人: Goran Ekstrom
• 金额: $ 39.93万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-03-01 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936254&HistoricalAwards=false
• 关键词: Community; Facility; Support; Global; CMT

This award supports the Global Centroid-Moment-Tensor (CMT) Project, which provides analysis of global earthquake activity and a consistent, high-quality catalog of earthquake source parameters, the Global CMT Catalog. The objective of the Global CMT Project is to provide the best and most comprehensive record of global seismic strain release available. The basic earthquake parameters determined in a CMT analysis represent primary observations of the earthquake source process and provide valuable constraints for modeling and interpretation of global and regional tectonic activity. The CMT parameters allow description and prediction of global ground motion due to an earthquake. The CMT Catalog is the standard data base used in regional seismicity and tectonic studies, and the results are used in studies of stress changes and deformation due to earthquakes, as well as for research into complex and unusual seismic events, and for analyses of seismic hazard in the US and elsewhere. Educators at several levels integrate products from the CMT Project in a variety of activities. The CMT Project's current operational goal is to analyze all earthquakes with magnitudes greater than or equal to 5.0 occurring anywhere in the world. The results are disseminated via the project web site as well as by the IRIS Data Management Center and the International Seismological Centre; rapid analyses are also disseminated by email. The work supported by this award involves five main activities: (1) Systematic determination, with a three-month delay, of moment tensors for earthquakes of magnitude 5.0 and larger globally, and archiving of the results in the CMT catalog; (2) Rapid determination of moment tensors for earthquakes of magnitude 5.5 and larger globally and quick dissemination of the results; (3) Curation of the CMT catalog and continued improvements of the distribution mechanisms for this data base; and (4) Routine detection and location of seismic sources using surface waves and distribution of a catalog of detected events. This award will also support improvements necessary for automated contribution of CMT results to the USGS/NEIC Product Distribution Layer (PDL); and planning and technical preparation for the recalculation of the CMT catalog using a homogeneous set of modern Earth models and analysis techniques.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项支持全球质心张量（CMT）项目，该项目提供了全球地震活动的分析以及全球CMT目录的一致，高质量的地震源参数目录。全球CMT项目的目的是提供可用的全球地震应变释放的最佳，最全面的记录。在CMT分析中确定的基本地震参数代表了地震源过程的主要观察结果，并为全球和区域构造活动的建模和解释提供了有价值的约束。 CMT参数允许描述和预测由于地震而引起的全球地面运动。 CMT目录是区域地震性和构造研究中使用的标准数据库，结果用于研究应力变化和由于地震引起的变形和变形，以及对复杂和异常的地震事件的研究，以及用于美国和其他地方的地震危害的分析。多个级别的教育工作者将来自CMT项目的产品集成到各种活动中。 CMT项目的当前运营目标是分析大幅度大于或等于5.0发生的所有地震。结果通过项目网站以及IRIS数据管理中心和国际地震中心传播；快速分析也通过电子邮件传播。该奖项支持的工作涉及五个主要活动：（1）在全球5.0及全球范围更大的地震中，有三个月延迟的系统确定，并在CMT目录中存档结果； （2）快速确定5.5及全球范围较大的地震的矩张量和结果的快速传播； （3）CMT目录的策划和该数据库的分布机制的持续改进； （4）使用表面波和检测到的事件目录的分布的地震源的常规检测和位置。该奖项还将支持CMT结果对USGS/NEIC产品分销层（PDL）的自动贡献所必需的改进；以及使用一套均匀的现代地球模型和分析技术重新计算CMT目录的计划和技术准备。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛的影响来通过评估来获得支持的。