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- W2350083711 abstract "Through analyzing and sorting out the short-impending medium-strong foreshocks occurred from 1965 to 2003 in three months before the strong earthquakes in Yunnan region,short-impending foreshocks are classified as three kinds according to their durations,the direct foreshocks,the impending foreshocks and the short-term foreshocks.By studying on seismic activity for earthquake sequence variation,the features of the three kinds of foreshocks are obtained as following:(1)Common anomalies for the direct foreshocks appeared a sudden decrease of time intervals of the M3 earthquakes and M4 earthquakes and obvious attenuation of earthquake frequency in the second time interval after dividing seismic sequence into the three equal part on time.(2)Common characteristics for impending foreshocks manifested high frequency of events in the first day and low frequency of events in the second day after the foreshocks,with roughly identical signs or linear distribution of P wave first motion.(3)Common characteristics for short-term foreshocks showed attenuation of foreshocks frequency to zero in 10 days after foreshocks and seismic frequency showed a sudden increase in about 20 to 30 days,at the same time,h-value and p-value also showed similar to characteristics.Rapidly decreased of h-value towards 1 or less than 1 and stable b-value lower than regional background value in 30 days after the foresshocks.The results provide the basis for short-impending prediction of the strong earthquakes in Yunnan region." @default.
- W2350083711 created "2016-06-24" @default.
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- W2350083711 date "2006-01-01" @default.
- W2350083711 modified "2023-09-23" @default.
- W2350083711 title "Preliminary Research on the Sequence Characteristic of the Short-Impending Medium Strong Foreshocks before Strong Earthquake in Yunnan Region" @default.
- W2350083711 hasPublicationYear "2006" @default.
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