A Study on the Scientific Value of Historical Records for the Huaxian MS8¼ Earthquake in 1556

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    Historical records of the Huaxian MS8? earthquake in 1556 are one of the most abundant in China.In this paper,we assess the seismological scientific value of the Huaxian earthquake historical records.The study includes the following:(1)an investigation of ground rotational movement often felt before large earthquakes,which can be used as an index of immediate earthquake and an early warning;(2)we determine the time span of seismic changes,from small to large,prior to sizeable earthquakes based on historical records;(3)elaborate on the medium-term precursor of the relationship between drought and earthquake before large earthquakes;(4)strong-moderate earthquakes were found to be active in the Fenhe graben before large earthquakes;(5)the seismic cycle of Weihe basin was determined to be 600 years;(6)we use the distribution index of triplet method for the occurrence time of historical earthquakes;and(7)verification of intensity zoning that the Huaxian earthquake points out and asymmetry of intensity that the Huaxian earthquake reveals.Furthermore, we also study and discuss the scientific significance and historical status of Earthquake Records written by Qin Ke-da.

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  • Online: August 04,2014
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