Acta Seismologica Sinica

, Volume 14, Issue 6, pp 626–633 | Cite as

Influence of statistical time range on estimating seismicity parameters

  • Huang Wei-qiong 
  • Wu Xuan 


The influence of non-uniqueness in selecting statistical time ranges on seismicity parameters ofb value and annual mean occurrence ratev 4 is widely analyzed and studied. The studied result states that the influence of statistical time range on theb value is generally smaller than on the annual mean rate. Owing to the exponentially functional relation between the annual mean rate andb value, the variation ofb value by varying statistical time range brings about decrease or increase in the annual mean rates of each magnitude interval with power progression law. These results will exert a synthetic effect on seismic safety evaluation results in various regions in our country.

Key words

statistical time range b value annual mean occurrence rate uncertainty 

CLC number



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Copyright information

© Acta Seismologica Sinica 2001

Authors and Affiliations

  • Huang Wei-qiong 
    • 1
  • Wu Xuan 
    • 1
  1. 1.Institute of GeophysicsChina Seismological BureauBeijingChina

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