《中国震例》前兆资料的初步研究

PRELIMINARY RESEARCH ON THE PRECURSORY DATA FROM 《EARTHQUAKE CASES IN CHINA》

《中国震例》一书的60次震例共有前兆异常927项次,分归11类观测手段和75种异常项目。文章介绍了震例和前兆的基本情况,给出了对地震异常数量、不同地区定点观测项目的异常百分比及按观测手段和异常项目进行统计和分析研究的主要结果。在这些工作的基础上,作者进一步总结了我国大陆地震前兆的几条基本的综合特征:地震前兆的多样性与综合性;异常持续时间的长期性与阶段性;前兆分布范围的广泛性与非均匀性;地震异常的统计量与震级间存在正变关系;地震前兆的高度复杂性。文章指出了它们在理论和实践上的意义,与日、美、苏的地震前兆作了分析对比,并建议推进对我国大陆地震前兆的深入研究。

There are 927 items/times in total of precursory anomalies for 60 earthquakes in the book 《Earthquake Cases in China》. They are grouped into 11 kinds of observational means and 75 sorts of abnormal items respectively. This paper introduced the basic conditions for earthquake cases and precursors, presented quantity of anomalies the anomalous precentage of fixed observational items of earthquakes and different regions as well as the main results of statistics and analysis research carried out according to the observational means and anomalous items. Based on these research results above, authors here further summed up several basic comprehensive characteristics of earthquake precursors in the mainland of China: diversity and comprehensiveness of earthquake precursors; the protracted and periodic nature of the anomalous duration; extensive and heterogeneous distribution of precursors; a direct varied relation existing between the statistic amount of earthquake anomalies and magnitude; the high complexity of earthquake precursors. The paper pointed out its significance in theory and practice, made analytic comparison with the earthquake precursors of Japan, U. S. A. and the Soviet Union and proposed to promote the further research on the earthquake precursors in the mainland of China.