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Progress in Earthquake Studies in China for the Past 30 Years

机译：30年来中国地震研究进展

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Progress and application of earthquake studies are important and effective fundamentals for the improvement of earthquake prevention and disaster reduction. Through industrious effort during the past 30 years, significant advances were made in understanding the rules of earthquake occurrence, and the mastering and applying of the technology of earthquake prevention and disaster reduction. A number of devices that come close to or reach advanced world levels have been established and some systems in seismological experiments and earthquake prevention work have been unproved, the ability to test and identify earthquake precursors have been raised, and the understanding of the complexity of these precursors has been deepened. The practical indexes and approaches for earthquake prediction have been worked out, and remarkable achievements in predictions and prevention of major earthquakes have been obtained, such as with the Haicheng Earthquake of M=7.3. New technology has been introduced into the research of the geological environment of earthquakes. This study, which is progressing from static research to a dynamic one, from surface study to depth study, and from qualitative analysis to quantitative analysis, has thrown some significant light in the regionalization of seismic activities on the Chinese mainland and the structural characteristics of major earthquake zones. Compared with the compilation of 1957, China's Earthquake Intensity Zone Division, compiled in 1990 and 1977, is not only supported with more abundant and reliable data but also shows important improvements with regard to dividing principles and methodology. This indicates the technological progress in the assessment of earthquake loss and earthquake intensity determination. There have also been some significant achievements in the fields of anti-earthquake structure theory, principles of anti-earthquake design and their standards, as well as fundamental research, such as seismic wave transmission, the physics of seismic focus, the structural stress field, etc.
机译：地震研究的进展和应用是改进防震减灾的重要有效基础。经过三十多年的努力，在理解地震发生规律，防震减灾技术的掌握和应用方面取得了重大进展。已经建立了许多接近或达到世界先进水平的设备，还没有对地震实验和地震预防工作中的某些系统进行验证，提高了测试和识别地震前兆的能力，并且对这些复杂性的理解前体已经加深。提出了地震预报的实用指标和方法，在海地震级M = 7.3等大地震的预报和预防上取得了显著成绩。新技术已被引入地震地质环境研究中。从静态研究到动态研究，从表面研究到深度研究，从定性分析到定量分析，这项研究为中国大陆地震活动的区域化和主要构造特征提供了重要启示。地震带。与1957年的资料相比，1990年和1977年编制的中国地震烈度区划不仅得到了更丰富和可靠的数据支持，而且在划分原则和方法上也显示出重要的进步。这表明在地震损失评估和地震烈度确定方面的技术进步。在抗震结构理论，抗震设计原理及其标准领域以及基础研究方面也取得了一些重大成就，例如地震波的传播，地震震源物理学，结构应力场，等等

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