CAREER: Innovative Seismic Sensing for Earthquake Analysis and Seismic Hazard Assessment

职业：用于地震分析和地震灾害评估的创新地震传感

• 批准号: 0952376
• 负责人: Elizabeth Cochran
• 金额: $ 49.57万
• 依托单位: University of California-Riverside
• 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 2011-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0952376&HistoricalAwards=false
• 关键词: CAREER; Innovative; Seismic; Sensing; Earthquake

The Quake-Catcher Network (QCN) is a transformative approach to earthquake detection, science, and outreach. QCN is a distributed computing seismic network that links internal (no cost, built-in) or external (low-cost, USB-based) accelerometers connected to any participating computer for earthquake research. The objective of QCN is to dramatically increase the number of seismic observations by exploiting recent advances in sensing technologies and cyberinfrastructure. This approach will enable the creation of the world?s largest and lowest-cost seismic network to explore earthquake fault rupture and the ground response to seismic wave passage by leveraging innovative cyber-enabled seismic data. This proposal will result in 375 QCN seismic stations at regional K-12 schools and an additional thousand public participants to enable groundbreaking discoveries in seismology. The work will address the following scientific questions: 1) Can MEMS technology and distributed computing produce transformative outcomes in real-time seismology applications by increasing the density of strong-motion observations, improved triggering algorithms and metadata generation, and innovative clustering algorithm development? 2) How do earthquake source properties, such as slip amplitudes and rupture velocity, vary at small spatial scales and how does increased density of observations improve the resolution and stability of source rupture modeling? 3) What is the variability in seismic amplification at a block-by-block scale and do increased seismic observations translate into improved prediction of ground motion estimates?The proposed work will result in wide-reaching educational outcomes by involving the community directly in seismic research. Any member of the public, a school, or a community organization can house a QCN strong-motion station. In return, the participant becomes a citizen-scientist, receives up-to-date science results, and access to educational activities and interactive software. The two main educational objectives of this proposal are to: (1) improve student engagement in science and (2) increase community understanding of earthquakes and related seismic hazards. To achieve the first objective, the PI will augment and improve classroom activities that utilize QCN sensors and software and distribute 375 USB-connected MEMS sensors to classrooms. In addition, teacher workshops will be held each year to introduce teachers to QCN, provide educational materials, and form sensor-communities. To accomplish the second objective, the PI will work closely with regional museums to develop displays that incorporate interactive models, regional seismic hazard information, and preparedness information. The QCN software and sensors are a natural platform to introduce the public to seismology as it allows for real-time displays of acceleration data. The aim is to improve public understanding of earthquakes and empower the public to take an active role in earthquake preparedness and policy discourse.

Quake-Catcher Network (QCN) 是地震检测、科学和推广的革命性方法。 QCN 是一种分布式计算地震网络，可连接内部（免费、内置）或外部（低成本、基于 USB）加速度计，这些加速度计连接到任何参与地震研究的计算机。 QCN 的目标是通过利用传感技术和网络基础设施的最新进展来大幅增加地震观测的数量。这种方法将能够创建世界上最大、成本最低的地震网络，通过利用创新的网络地震数据来探索地震断层破裂和地震波通过的地面响应。该提案将在地区 K-12 学校建立 375 个 QCN 地震台，并增加 1000 名公众参与者，以实现地震学领域的突破性发现。这项工作将解决以下科学问题：1）MEMS 技术和分布式计算能否通过增加强震观测密度、改进触发算法和元数据生成以及创新聚类算法开发，在实时地震学应用中产生变革性成果？ 2）地震震源特性（例如滑移幅度和破裂速度）如何在小空间尺度上变化，以及观测密度的增加如何提高震源破裂模型的分辨率和稳定性？ 3) 地震放大在逐块尺度上的变化是什么？增加的地震观测是否会转化为改进的地震动估计预测？拟议的工作将通过让社区直接参与地震研究而产生广泛的教育成果。任何公众、学校或社区组织都可以设立 QCN 强震动站。作为回报，参与者成为公民科学家，获得最新的科学成果，并获得教育活动和互动软件的机会。该提案的两个主要教育目标是：(1) 提高学生对科学的参与度；(2) 提高社区对地震和相关地震灾害的了解。为了实现第一个目标，PI 将增强和改进利用 QCN 传感器和软件的课堂活动，并向教室分发 375 个 USB 连接的 MEMS 传感器。此外，每年都会举办教师研讨会，向教师介绍 QCN、提供教育材料并组建传感器社区。为了实现第二个目标，PI 将与地区博物馆密切合作，开发包含交互式模型、地区地震灾害信息和防备信息的展示。 QCN 软件和传感器是向公众介绍地震学的自然平台，因为它可以实时显示加速度数据。其目的是提高公众对地震的了解，并使公众能够在地震防备和政策讨论中发挥积极作用。