摘要
通过对四川姑咱地震台微震观测记录的普查与系统研究，表明在大约９０ｋｍ范围内，小震活动频度变化与附近５．５级以上地震具有较好的对应关系，它能较灵敏地反映区域应力场的变化。文中分析了姑咱地震窗即前兆敏感点小震月频度的异常特性、预报判据指标及其预报效能。最后，对所得结果的可能物理机制等问题进行了讨论。
After censusing and studying the microseismic observation records from Guza seismostation in Sichuan province, the result shows that the frequency variahon of small earthquake activity is better correlate to the Ms≥5. 5 earthquakes occuring in the neibauring region within the range of about 90 km, which can reflect on the variation of regional stress field sensitively. The anodely features of small earthquake monthly frequency of Guza seismic window, by which is meant precursor sensitive point, the criteria and index of prediction and its predictability are analyzedl as these results, the possible physical mechanism and other questions are dicussed.
出处
《华南地震》
1996年第4期34-39,共6页
South China Journal of Seismology
基金
地震科学联合基金
关键词
地震窗
地震前兆
地震预报
地震频度
Seismic window, Earthquake precursor,Earthquake prediction, Seismic frequency
