THE GREY RELATIONAL ANALYSIS OF THE EARTHQUAKE SEQUENCE TYPES
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    Abstract:

    In this paper,we study the earthquake sequence types using the grey relational analysis in grey system theory.The stress drop (△δ),seismic moment (M0),rupture speed (V),length (L) and width (D) of the aftershock region,magnitude difference between the main shock and the largest aftershock (△M) and a-value,b-value as well as P-value in aftershock sequence are considered as grey relational factors,at the same time the earthquake studied is considered as reference sequence of number (X0) and some historical earthquakes are considered as comparative sequence of number (Xi),when we carry out grey relational analysis.In addition,a great earthquake once occurred in some region,how to determine the earthquake sequence type rapidly using the grey relational analysis is also studied.The results show that this method is a good useful method and it is of certain practical value to us.

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History
  • Received:February 15,1990
  • Revised:
  • Adopted:
  • Online: June 30,2017
  • Published: