TIP方法在大华北地区预报效能的研究

A STUDY OF THE PREDICTION EFFFCTIVENESS OF TIP METHOD IN LARGE NORTH CHINA AREA

用改进的Ｍ８算法研究了１９７９年以来大华北地区存在的ＴＩＰ，即强震发生概率增长时间。结果表明８次中强震有７次发生在被判定为概率增长时间内，ＴＩＰ警戒占研究总时空域的４０．７％，Ｒ评分为０．４６８。获得了较好的中强震中期预测内符效果，表明该方法可作为大华北地区中强震中期预测的手段之一。

This paper studies the TIP, that is the probability increase time of the strong earthquakes occerrence, existing in North China area since 1979 by modified M8 algorithm.The result shows that 7 of the8 moderately strong earthquakes occurred in Probability increase time, the TJP warnings.makes up 40.7% of the studied total time-space domain,. the evaluated point of R is.0T468, objaining a relativelygood mid-term prediction effect of moderately strong earthquakes,which indicates that this metbod canbe used as one of mid - term prediction means of moderately strong earthquakes.,in lage North Chinaarea.