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ISSN 2096-7780 CN 10-1665/P

陈学忠, 李艳娥, 陈丽娟. 基于地震孕育过程追踪的地震预测方法[J]. 地震科学进展 . DOI: 10.19987/j.dzkxjz.2023-131
引用本文: 陈学忠, 李艳娥, 陈丽娟. 基于地震孕育过程追踪的地震预测方法[J]. 地震科学进展 . DOI: 10.19987/j.dzkxjz.2023-131
Chen Xuezhong, Li Yan’e, Chen Lijuan. Earthquake prediction method based on seismogenic process tracking[J]. Progress in Earthquake Sciences. DOI: 10.19987/j.dzkxjz.2023-131
Citation: Chen Xuezhong, Li Yan’e, Chen Lijuan. Earthquake prediction method based on seismogenic process tracking[J]. Progress in Earthquake Sciences. DOI: 10.19987/j.dzkxjz.2023-131

基于地震孕育过程追踪的地震预测方法

Earthquake prediction method based on seismogenic process tracking

  • 摘要: 准确的地震预测是实现有效减轻地震灾害的途径之一。目前地震预测仍处于经验预测阶段,其准确度远远不能满足有效减轻地震灾害的有需求。地震预测的发震趋势在于从经验预测向物理预测过渡,这个过渡的关键在于要首先实现对地震孕育过程更加深入的认识、描述和追踪。根据岩石力学实验结果,岩石破坏前主要经历了应力上升过程和其后的亚失稳阶段。我们分析了天然地震的孕育过程。分析时将视应力和b值进行结合,以获得地壳介质的应力变化信息,利用地震活动与地球自转之间的相关性(用p值描述)来获取地壳介质的临界状态或亚失稳阶段的信息,从而实现对地震孕育过程的描述。本文在对天然强震孕育过程进行震例研究的基础上,提出了基于地震孕育过程追踪的地震预测思路和方法,给出了中—短期地震危险区判定依据。以期对实际地震预测工作具有所裨益。

     

    Abstract: Accurate earthquake prediction is one of the ways to effectively reduce earthquake disasters. Until now, empirical earthquake prediction methods have remained in use, but the accuracy falls far short of what is needed to effectively mitigate earthquake disasters. The trend in earthquake prediction lies in the transition from empirical prediction to physical prediction, and the key to this transition is to achieve a deeper understanding, depiction, and tracking of the seismogenic process. According to the experimental results of rock mechanics, it can be found that before failure, the rock mainly experienced a stress-increase stage and a subsequent stage of sub-instability. We have analyzed the seismogenic process of some natural earthquakes. In the analysis, apparent stress and b-value are used together to obtain information on the stress variability of the crustal medium. The correlation between seismicity and Earth rotation (described by p-value) is used to obtain information about the critical state or sub-instability phase of the crustal medium. Thus, the seismogenic process can be depicted. In this paper, based on a case study of the seismigenic process for some natural strong earthquakes, we propose an idea and method for earthquake prediction based on the tracking of the seismogenic process, and provide a basis for the identification of short- to mid-term siemic risk regions. It is expected to be beneficial for practical earthquake prediction.

     

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