Mapping the Spatial Distribution of the Origin of High Frequency Seismic Energy from Extended Faults

绘制延伸断层高频地震能量来源的空间分布图

• 批准号: 9205369
• 负责人: Yuehua Zeng
• 金额: $ 8.3万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9205369&HistoricalAwards=false
• 关键词: Mapping; Spatial; Distribution; Origin; Frequency

This research is to extend the study of earthquake fault rupture surfaces to higher frequency radiation, above 3 hertz. In this range, waveform inversion has proven impractical due to earth's complexities and a procedure has been developed using seismic wave energy envelopes. The technique locates high frequency energy sources on extended faults by means of strong motion seismograms. Preliminary results indicate that the high frequency energy sources are located along or near the boundaries of large slip zones. This supports the hypothesis that high frequencies are most strongly generated from rupture stopping areas or areas with large slip variation, which has implications for earthquake hazard estimates. The current work will extend the analysis to more earthquakes. This research is a component of the National Earthquake Hazard Reduction Program.

本研究是对地震断层研究的拓展 在3赫兹以上的高频辐射下会破裂 在该范围内，由于以下原因，波形反演已被证明是不切实际的： 地球的复杂性，并开发了一种程序， 地震波能量包络线 技术定位高 频率能量源的扩展故障，通过强 运动地震图 初步结果显示， 频率能量源沿着或靠近边界定位 大的滑动带。 这支持了一个假设，即高 破裂停止时产生的频率最强 区域或滑动变化较大的区域， 用于地震危险评估。 目前的工作将扩大到 分析更多的地震。 这项研究是 国家地震减灾计划。