Nucleation and Evolution of Rupture for the Northridge Earthquake from Analysis of Strong-Motion Data

从强震数据分析北岭地震破裂的成核和演化

• 批准号: 9416546
• 负责人: Gregory Beroza
• 金额: $ 2.94万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-12-01 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416546&HistoricalAwards=false
• 关键词: Nucleation; Evolution; Rupture; Northridge; Earthquake

9416546 Beroza This research is to model strong-motion data of the Northridge earthquake in order to estimate the factors controlling earthquake rupture and to understand the component of the strong ground motion attributable to the earthquake source. A unique aspect of the near-source data for this earthquake is that a number of high dynamic range digital accelerographs recorded the initiation. Like the Loma Prieta and Landers earthquakes before it, the Northridge earthquake began gradually before breaking out into a large event. A goal is to understand how earthquakes nucleate. Preliminary work on this event and many other earthquakes indicates that there may be a distinct nucleation phase at the beginning of most earthquakes. This project is a contribution to the National Earthquake Hazard Reduction Program and is supported by the Northridge Earthquake Emergency Appropriation. ***

小行星9416546 本研究是为了模拟北岭地震的强震数据，以估计控制地震破裂的因素，并了解归因于震源的强地面运动的分量。 这次地震的近源数据的一个独特之处在于，许多高动态范围的数字加速度计记录了地震的发生。 就像之前的洛马普列塔和兰德斯地震一样，北岭地震在爆发成大地震之前是逐渐开始的。 目标之一是了解地震是如何成核的。 对这一事件和许多其他地震的初步研究表明，在大多数地震的开始可能有一个明显的成核阶段。 该项目是对国家地震减灾计划的贡献，并得到北岭地震紧急拨款的支持。 ***