摘要
用反映地震活动增强特征的地震强度因子Mf 值,系统研究了其在华南和东北地区中强以上地震前的中短期( T≤1 年) 异常变化。结果发现在震前1 年左右,半数震例的震中附近地区出现Mf 值中期异常区明显收缩,即可认为出现Mf 值中短期异常,亦即认为当前已进入地震孕育的中短期阶段。笔者通过对Mf
The short medium term(T≤1 year) anomalous variations prior to the earthquake over moderate magnitude are systematically studied for south and northeast China using the seismic strength factor M f value reflecting seismicity increase characteristics. It is found that the medium term anomalous area of M f value near epicentre obviously decrease in 50% earthquake cases in some 1 year before earthquake, which is considered as the short medium term anomaly of M f value.
出处
《地震学刊》
CSCD
1999年第4期1-6,共6页
Journal of Seismology
基金
中国地震局九五基金!(19950406)
