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

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.