强震短期前兆异常特征物理分析和解释的研究进展

Study progress of physical analysis and explanation of short-term strong earthquake precursory anomaly characteristics

总结了"十五"国家科技攻关项目强震短期前兆异常特征的物理分析和解释方面的研究成果,并将主要进展归纳为4个方面,即:通过大量台网数据的扫描处理和震例研究,分析了地电、地形变、地下流体强震短期前兆的典型特征;提出了典型短期前兆特征依托的实验基础和理论依据,进行了数值模拟和理论解释;通过数值模拟方法,探讨了短期地震活动性图像特征和强余震触发机理;总结了大陆强地震的卫星热红外异常演化过程,提出了活动断裂带内、外温度和地表温度场提取的技术方法。

Summarized the main scientific and technological achievement of physical analysis and explanation of short-term strong earthquake precursory anomaly characteristics for the project supported by the MOST under contract. The major progress can be divided into 4 aspects, that is, analyzing typical characteristics of short-term strong earthquake precursors of geoelectricity, ground deformation and subsurface fluid by scanning a large number of station and network data and studying the earthquake cases. Putting forward experimental foundation and theoretical basis based on typical short-term precursory characteristics, conducting numerical simulation and theoretical explanation. Discussing the short-term seismic activity image feature and strong after-earthquake triggering mechanism through numerical simulation. Summarizing heat infrared anomaly evolution course of continental strong earthquakes, putting forward technical method for collecting the temperature field data inside and outside fault zones and earthquake surface temperature field data.