摩擦状态-速率依从的区域地震触发模型研究

地震 ›› 2004, Vol. 24 ›› Issue (1): 176-183.

摩擦状态-速率依从的区域地震触发模型研究

刘桂萍¹, 傅征祥², 李钢², 郝平²

1.中国地震局监测预报司, 北京 100036;
2.中国地震局分析预报中心, 北京 100036

出版日期:2004-01-31 发布日期:2021-11-29
作者简介:刘桂萍(1987-), 女, 天津市人, 研究员, 2000年获博士学位, 主要从事地震预报, 地震活动性及其力学机制等方面的研究。
基金资助:
“十五”国家科研攻关项目(强地震短期预测技术研究02-02-4); 中国-希腊-意大利国际地震合作项目

Study on the frictional state-velocity dependent model of regional triggering seismicity

LIU Gui-ping, FU Zheng-xiang, LI Gang, HAO Ping

1. The Department of Monitoring and Prediction, CSB, Beijing 100036 Beijing, China;
2. Center for Analysis and Prediction, CSB, Beijing 100036, China

Online:2004-01-31 Published:2021-11-29

摘要/Abstract

摘要： 设计一个具有摩擦状态-速率依从机制模拟大地震后区域触发地震的模型, 该模型由一定数量表示地震成核断层的函数组成。大震对区域静应力场的影响由应力阶跃载荷表现, 利用摩擦状态-速率依从的一维自由度弹簧滑块模型结果计算地震发生时间提前。结果表明, 施加幅度为地震应力降几十分之一至百分之一的应力阶跃, 可以引起地震发生速率的明显变化, 该变化通过统计检验, 与大地震后的区域触发地震活动相似。

关键词: 摩擦状态-速率依从, 区域触发地震, 数学物理模型

Abstract: A frictional state-velocity dependent model was designed to study regional seismicity triggered by big earthquakes, which consisted of a number of functions representing the seismic nucleation faults. The effect of regional stress caused by big events was presented by stress step load, and a one-dimension frictional state-velocity dependent model of free string-block was used to estimate the advanced occurring time of events. The results show that remarkable change of seismicity could be detected while a stress load with amplitude one to several percents of stress drop was added, which was similar to the regional seismicity triggered by a big event. Change of the seismicity was proved to be significant by statistical test.

Key words: Frictional state-velocity dependent, Regional triggering seismicity, Mathematical-Physical model

中图分类号:

P315

刘桂萍, 傅征祥, 李钢, 郝平. 摩擦状态-速率依从的区域地震触发模型研究[J]. 地震, 2004, 24(1): 176-183.

LIU Gui-ping, FU Zheng-xiang, LI Gang, HAO Ping. Study on the frictional state-velocity dependent model of regional triggering seismicity[J]. EARTHQUAKE, 2004, 24(1): 176-183.

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