Mathematical principles of predicting the probabilities of large earthquakes
V. M. Ghertzik
备注:
25 pages. Accepted in Physics of the Earth, 2006 (in Russian). English translation: Izvestiya, Physics of the Solid Earth; typos corrected, some changes in the text
发表信息:
Physics of the Earth, 2006 (6), 21-31. Engl. transl. Izvestiya, Physics of the Solid Earth, 42 (6), 2006, 457-476
A multicomponent random process used as a model for the problem of space-time earthquake prediction; this allows us to develop consistent estimation for conditional probabilities of large earthquakes if the values of the predictor characterizing the seismicity prehistory are known. We introduce tools for assessing prediction efficiency, including a separate determination of efficiency for "time prediction" and "location prediction": a generalized correlation coefficient and the density of information gain. We suggest a technique for testing the predictor to decide whether the hypothesis of no prediction can be rejected.
Exceedance Probabilities for Large Earthquakes From DIY Local Earthquake Ensemble Nowcasting and Forecasting
University of California, Davis(加州大学戴维斯分校);Santa Fe Institute(圣塔菲研究所);Jet Propulsion Laboratory(喷气推进实验室);Purdue University(普渡大学);University of California, Irvine(加州大学尔湾分校);University of Virginia(弗吉尼亚大学);Shizuoka University(静冈大学)
A Framework for Modeling Liquefaction-Induced Road Disruptions After Earthquakes: Implications for Emergency Response and Access in the Cascadia Region of North America
Dept. of Civil and Environmental Engineering, University of Washington(华盛顿大学土木与环境工程系);Dept. of Civil and Environmental Engineering, University of Auckland(奥克兰大学土木与环境工程系)
Comparison of observed ground-motion attenuation for the 2016/04/16 Mw7.8 Ecuador megathrust earthquake and its two largest aftershocks with existing ground-motion prediction equations
2016年4月16日23时58分,厄瓜多尔海岸发生Mw7.8级地震。这次地震是迄今为止记录最好的大型逆冲事件之一。除了主震之外,2016年5月18日还记录了两次大余震,分别为7 h57(Mw6.7)和16 h46(Mw6.9)。这些数据为了解厄瓜多尔地震动的衰减做出了重要贡献。峰值地面加速度和谱加速度与为界面地震开发的四个地面运动预测方程进行了比较,全球Abrahamson et al.(2016)模型,日本方程Zhao et al.(2006)和Ghofrani and Atkinson(2014),以及智利方程Montalva et al.(2016)。四个测试的GMPE提供了距离200公里的主震相当接近的预测。然而,我们的结果表明,弧后部位的高频衰减更大,因此没有考虑这种差异的Zetal 2016和Metal 2016没有进一步考虑。残差分析表明,G&A14和Aetal 2016很好地预测了主震的地震动衰减。余震观测结果与Aetal 2016预测的比较表明,GMPE对观测到的衰减率提供了合理的拟合。Mw6.7和Mw6.9级地震的事件项为正值,但在全球类似地震的预期离散范围内。事件内标准差高于模型的事件内变异性,这部分与VS 30模型约束不良有关。
The Andravida, Greece EQ (8/06/2008, Ms=7.0R). An "a posteriori" analysis for the determination of its location, occurrence time and magnitude parameters in terms of short-term predictability
Text Classification of the Precursory Accelerating Seismicity Corpus: Inference on some Theoretical Trends in Earthquake Predictability Research from 1988 to 2018
在过去几年中,已经发表了一些地面运动预测模型,用于预测界面地震和室内地震产生的地面运动。当必须在包含俯冲带的区域进行概率地震危险性分析时,必须选择GMPEs来馈送逻辑树。在本研究中,目的是确定哪些模型提供了对数据集M6+,全局或局部模型的最佳拟合。俯冲地区包括日本、台湾、中美洲、南美洲和希腊。大部分数据来自为开发新的BCHydro俯冲全球GMPE而建立的数据库(Abrahamson等人,提交)。我们发现,该模型在所有情况下都是最佳拟合模型之一,紧随其后的是Zhao et al.(2006),而当地的Lin and Lee(2008)很好地预测了台湾和希腊的数据。Scherbaum等人(2009)LLH方法被证明可有效提供一个量化总体拟合的数字,但必须对事件间和事件内变异性进行额外分析,以控制每个事件的中位数预测和/或事件内变异性是否在模型预测的散点内。