青海省及邻近区域历史地震目录完整性分析探讨

COMPLETENESS ANALYSIS ON EARTHQUAKE CATALOGUES IN QINGHAI AND ITS NEIGHBORING AREAS

以b值研究为基础,运用多种手段对青海及邻近区域的地震目录的完整性进行了分析研究,大致确定了不同震级下限的完整目录的起始时间,得出如下结果:认为4.7级以上地震的完整起始年为1960年左右,5.0级地震的完整起始年为1950年左右;5.5级以上地震的完整起始年为1925年左右;6级以上地震的完整时段为1917年左右。

Based on b value, the completeness of earthquake catalogues analyzed by many methods, and mainly determined the beginning times in Qinghai and its neighboring areas is of different magnitude in the completeness catalogues, and obtained the results that Ms≥4.7 earthquake catalogue is about in 1960, Ms≥5.0 earthquake catalogue is about in 1950; Ms≥5.5 earthquake catalogue is about in 1925; Ms≥6. 0 earthquake catalogue is about in 1917.