Title: STUDY ON CHARACTERISTICS OF THE SEISMICITY ENHANCEMENT OF MODERATE EARTHQUAKES BEFORE M≥5 EVENTS IN NINGXIA AND ITS ADJACENT AREAS
Abstract: Through analysising the seismicity data before M L ≥5.0 earthquakes in Ningxia and its adjacent areas since 1965,it is found that there mostly is the characteristics of enhancement of moderate earthquakes before M L ≥5.0 earthquakes.In A part of the study area,the probability for occurrence of M L ≥5.0 earthquake is 0.71 after anomaly of the enhancement of moderate earthquakes in 7 months;and it is 0.60 in 3 years in B part.The probability that earthquake locats near the outer linked lines of all earthquakes in one enhancement of moderate earthquakes is 0.79.Its R value is 0.75.So the enhancement of moderate earthquakes can be a middle period prediction method for M≥5 earthquake in this region.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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