SI2-SSI: Community Software for Extreme-Scale Computing in Earthquake System Science

南加州地震中心(SCEC)的综合地震建模软件环境(SEISM)项目将开发先进的地震模拟软件，该软件能够使用高性能计算来产生有关地震及其带来的危险的新信息。SCEC的SEISM项目正在为地震系统科学开发一个综合的、可持续的社区软件框架，以服务于地震科学家和工程师、计算机科学家和处于风险中的利益相关者的不同社区。SEISM项目是几个不同用户群体之间的合作，他们在降低地震风险和提高地震复原力方面有着共同的兴趣。SCEC SEISM的研究人员正在解决限制当前地震过程数字表示的准确性和规模的科学问题。地震危险性计算中的SEISM计算改进将使全世界的地震系统科学受益。SCEC SEISM项目将培养从本科到职业早期的多样化STEM劳动力，并将在具有挑战性的高性能环境中交叉培训科学家和工程师。作为SEISM的一个应用，研究人员将为加州大地震开发新的模拟，这场地震正在吸引数百万人进行地震准备工作。概率地震危险性分析所需的时空尺度的地震模拟提出了地球科学中一些最困难的计算挑战，需要极大规模的计算。南加州地震中心正在创建一个综合地震建模软件环境(SEISM)，它将提供将概率地震危险分析转化为以物理为基础的科学所需的极端规模模拟能力。该项目将通过用户驱动的研究和开发议程推进SEISM，将把经过验证的SEISM能力推向更高的地震频率和极端规模的计算。它将为地震系统科学开发一个综合的、可持续的社区软件框架，为地震科学家和工程师、计算机科学家和面临风险的利益攸关方的不同社区提供服务。一个新的SEISM-T框架将支持现场和后自组织数据处理，以有效利用现有的异类体系结构。该项目的主要目标是在当前能力的基础上，将恒定时间到解算的4D外部尺度/内部尺度比增加两个数量级。软件开发计划将采用测试驱动开发、持续软件集成、每个应用程序的自动化验收测试套件、频繁发布软件以及关注用户反馈的敏捷流程。研究人员将利用SCEC实施接口，在用户社区之间就SEISM在降低地震风险和增强地震复原力方面的应用开展对话。这项研究将解决限制当前地震过程数值表示的精度和尺度范围的基本科学问题，这将使全世界的地震系统科学受益。该项目将培养从本科生到职业生涯早期的多样化的STEM劳动力队伍，并将在具有挑战性的高性能环境中交叉培训科学家和工程师。作为SEISM的一个应用，该项目团队将为大加州地震灾害开发新的模拟，该地震灾害正在吸引数百万人参加地震准备演习。

The Software Environment for Integrated Seismic Modeling (SEISM) Project of the Southern California Earthquake Center (SCEC) will develop advanced earthquake simulation software capable of using high-performance computing to produce new information about earthquakes and the hazards they present. SCEC's SEISM project is developing an integrated, sustainable community software framework for earthquake system science to serve diverse communities of earthquake scientists and engineers, computer scientists, and at-risk stakeholders. The SEISM project is a collaboration among several diverse user communities with shared interests in reducing seismic risk and enhancing seismic resilience. SCEC SEISM researchers are addressing scientific problems that limit the accuracy and scale in current numerical representations of earthquake processes. SEISM computational improvements in seismic hazard calculations will benefit earthquake system science worldwide. The SCEC SEISM project will educate a diverse STEM workforce from the undergraduate to early-career level, and it will cross-train scientists and engineers in a challenging high-performance environment. As one application of SEISM, the researchers will develop new simulations for the Great California ShakeOut, which is engaging millions of people in earthquake preparedness exercises.Earthquake simulations at the spatiotemporal scales required for probabilistic seismic hazard analysis present some of the toughest computational challenges in geoscience, requiring extreme-scale computing. The Southern California Earthquake Center is creating a Software Environment for Integrated Seismic Modeling (SEISM) that will provide the extreme-scale simulation capability needed to transform probabilistic seismic hazard analysis into a physics-based science. This project will advance SEISM through a user-driven research and development agenda that will push validated SEISM capabilities to higher seismic frequencies and towards extreme-scale computing. It will develop an integrated, sustainable community software framework for earthquake system science to serve diverse communities of earthquake scientists and engineers, computer scientists and at-risk stakeholders. A new SEISM-T framework will support both in-situ and post-hoc data processing to make efficient use of available heterogeneous architectures. The main goal of the project is to increase the 4D outer-scale/inner-scale ratio of simulations at constant time-to-solution by two orders of magnitude above current capabilities. The software development plan will use an agile process of test-driven development, continuous software integration, automated acceptance test suites for each application, frequent software releases, and attention to user feedback. The researchers will take advantage of the SCEC Implementation Interface to develop a dialog among user communities regarding the application of SEISM to the reduction of seismic risk and enhancement of seismic resilience. This research will address fundamental scientific problems that limit the accuracy and scale range in current numerical representations of earthquake processes, which will benefit earthquake system science worldwide. This project will educate a diverse STEM workforce from the undergraduate to early-career level, and it will cross-train scientists and engineers in a challenging high-performance environment. As one application of SEISM, the project team will develop new simulations for the Great California ShakeOut, which is engaging millions of people in earthquake preparedness exercises.