| 由多个地震震源机制解求福建东南沿海地区平均应力场 |
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| 引用本文： | 钟继茂,程万正.由多个地震震源机制解求福建东南沿海地区平均应力场[J].福建地震,2006(Z2). |
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| 作者姓名： | 钟继茂 程万正 |
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| 作者单位： | 福建省地震局预报中心，四川省地震局预报研究所 |
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| 摘 要： | 基于震源断层面的空间取向和滑动方向,写出力轴张量在地理坐标系中的表达式,进而给出计算平均力轴张量及主值的方法,即通过求解相应的本征方程得到。对使用多个震源机制解中T,B,P轴参数计算平均应力场的正确性,以许忠淮用滑动方向拟合法反演富蕴、唐山地区平均应力场数据进行计算和验证。选择具有地震构造意义地块或地震带内大量地震的震源机制解研究区域平均应力场。根据福建东南沿海地区47次主要地震的震源机制解,给出了该区应力张量的定量分析结果。该方法物理意义明确,使由大量地震震源机制解资料分析构造应力场的方法走向定量化,并为定量探索区域应力场的整体动态变化成为可能。
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| 关 键 词： | 力轴张量 震源机制 平均应力场 东南沿海地区 |
To fine the average stress field in Fujian southeastern inshore from multi-focal mechanism solutions |
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| Zhong Jimao Cheng Wanzheng.To fine the average stress field in Fujian southeastern inshore from multi-focal mechanism solutions[J].Fujian Seismology,2006(Z2). |
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| Authors: | Zhong Jimao Cheng Wanzheng |
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| Institution: | 1) Fujian Earthquake Administration; 2) Sichuan Earthquake Administration |
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| Abstract: | Based on the space tropism and slip direction of source fault plane, it was written that the expression of force axis tensor in geographical coordinate system, so given the method of calculating average force axis tensor and main value., i.e., to get the solution by corresponding eigen equation. It was tested the validity of calculating average stress field using T,B,P axis parameters in multi-focal mechanism solution. According to the focal mechanism solutios of 47 earthquakes in Fujian southeastern inshore, it was given that the quantitative analysis results of the average stress field in the research region. |
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| Keywords: | Force axis tensor Focal mechanism solution Average stress field Southeastern inshore region |
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