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，能够使用高性能计算产生有关地震及其所带来的危害的新信息。SCEC的SEISM项目正在为地震系统科学开发一个集成的、可持续的社区软件框架，以服务于地震科学家和工程师、计算机科学家以及风险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增强地震恢复力方面有着共同的兴趣。SCEC SEISM研究人员正在解决限制当前地震过程数值表示精度和尺度的科学问题。SEISM在地震危险性计算方面的改进将有利于世界范围内的地震系统科学。SCEC SEISM项目将培养从本科到早期职业水平的多样化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。作为地震学的一项应用，研究人员将为加利福尼亚大震荡开发新的模拟，这将使数百万人参与地震准备演习。概率地震灾害分析需要在时空尺度上进行地震模拟，这是地球科学中最棘手的计算挑战，需要极端尺度的计算。南加州地震中心正在为综合地震建模（SEISM）创建一个软件环境，该环境将提供将概率地震危害分析转化为基于物理的科学所需的极端尺度模拟能力。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集成的、可持续的社区软件框架，为地震科学家和工程师、计算机科学家和风险利益相关者的不同社区服务。新的SEISM-T框架将支持原位和事后数据处理，以有效利用可用的异构架构。该项目的主要目标是在恒定的求解时间下，将4D模拟的外尺度/内尺度比目前的能力提高两个数量级。软件开发计划将使用测试驱动开发的敏捷过程、持续的软件集成、每个应用程序的自动化验收测试套件、频繁的软件发布以及对用户反馈的关注。研究人员将利用SCEC实现接口，在用户社区之间就SEISM应用于减少地震风险和增强地震恢复能力进行对话。本研究将解决限制当前地震过程数值表示精度和尺度范围的基本科学问题，这将有利于全世界的地震系统科学。该项目将培养从本科到早期职业水平的多样化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，项目团队将为大加州震动开发新的模拟，这将使数百万人参与地震准备演习。

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.