【摘要】 本文在对年最大地震震级分布讨论的基础上，研究其置信度问题，运用数理统计方法，确定对地震活动趋势分析的可信程度，为中长期地震预报提供了依据。更多还原

【Abstract】 On the basis of distribution of annual largest magnitudes, confidence limit has been studied in this paper. Creditability of seismic tendency has been determined using mathematical statistics which provides evidence for moderate-long term earthquake prediction.更多还原