Constraints on Volcanic Tremor Source Models from Worldwide Measurements of Tremor Amplitudes, Frequencies, Wave Types and Durations

全球震幅、频率、波类型和持续时间测量对火山震源模型的限制

• 批准号: 9418219
• 负责人: Stephen McNutt
• 金额: $ 4.5万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418219&HistoricalAwards=false
• 关键词: Constraints; Volcanic; Tremor; Source; Models

9418219 McNutt This project will support a post-doctoral investigator to complete an existing database ion volcanic tremor from more thal 160 volcanoes around the world. The most important parameter to be investigated is the amplitude of tremor which is normalized to reduced displacement. This problem is as fundamental as the determination of earthquake magnitudes. Preliminary results show that tremor reduced displacements during eruptions are proportional to the Volcano Explosivity Index (VEI), which is proportional to the tephra volume. We propose to test the hypothesis that the energy of volcanic tremor is directly proportional to the volume of magma and its contained volatiles. We will measure the seismic efficiencies of tremor, and we show preliminary data that suggest there are different efficiencies for different eruptive mechanisms. This project is complementary to many theoretical studies. It is broad and wide ranging because it includes data from all known seismically monitored volcanoes worldwide. Although the chief value of the project is scientific, several components, especially reduced displacement versus VEI, also have a direct bearing on volcanic hazards assessment and forecasting.

9418219麦克纳特这个项目将支持一名博士后研究员完成一个现有的数据库，该数据库来自全球160多座泰尔火山。要研究的最重要的参数是震颤的幅度，它被归一化为减少的位移。这个问题和确定地震震级一样重要。初步结果表明，火山喷发期间地震减少的位移与火山爆炸性指数(VEI)成正比，而VEI与火山灰体积成正比。我们建议检验火山震动的能量与岩浆及其所含挥发物的体积成正比的假设。我们将测量地震的地震效率，我们展示的初步数据表明，不同的喷发机制有不同的效率。这一项目是对许多理论研究的补充。它是广泛和广泛的，因为它包括来自世界各地所有已知的地震监测火山的数据。虽然该项目的主要价值是科学的，但有几个组成部分，特别是与VEI相比减少的排水量，也与火山灾害评估和预测有直接关系。