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EARTHQUAKE ›› 2015, Vol. 35 ›› Issue (2): 101-110.

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Application of Kcv Values in Forecasting Earthquakes in Hebei and its Neighboring Regions

QI Yu-yan1, SUN Li-na1, QIU Yu-rong2, LI Jiang1, JIN Xue-shen1   

  1. 1. Earthquake Administration of Hebei Province, Shijiazhuang 050021, China;
    2. Earthquake Administration of Shanxi Province, Xi’an 710068, China
  • Received:2014-05-29 Online:2015-04-30 Published:2020-06-24

Abstract: As an effective prediction index, the spatial distribution heterogeneity parameter Cv of seismicity has been widely used in recent years. However, Cv value can change with the different sample size of spatial distribution events. In this paper, Cv value is normalized as Kcv value, we counted the spatial heterogeneity distribution of earthquake events in Hebei and its adjacent regions, and combined with spatial-temporal synthetical probability gain model to study its feasibility in earthquake prediction. The prediction efficiency and the optimal time scale are calculated using theKcv value and earthquake case statistics over the past 40 years in the studied area. The feasibility and effectiveness of Kcv value method in earthquake prediction in Hebei region are further proved by analyzing its probability gain, and the probability of earthquakes greater than M5.0 with the actual earthquake occurrences from 2008 to 2012. And predictions of the greater than M5.0 earthquake probability and probability gain from 2013 to 2017 are carried out in this area.

Key words: Earthquake prediction, Kcv Value, Probability gain, Hebei province

CLC Number: