【摘要】 考虑近年大地震(MS≥7.0)震后快速灾害评估的需要,利用中国西部地区1900年以来MS≥7.0级地震的资料,采用最小二乘法拟合与分段函数对烈度限定相结合的方法,对西部地区的地震烈度衰减关系进行了改进,并就所得结果的合理性进行了分析;根据大震长轴半径的特点,初步研究了大震极震区长轴半径对烈度衰减规律的影响。更多还原

【Abstract】 Considering the needs of rapid seismic disaster evaluation of large earthquake( MS≥7. 0) in recent years,we used the seismic information data about MS≥7. 0 in the west of China and the method of combination of least squares fitting with the sectional function intensity determination to improve the seismic intensity attenuation relationship in western regions of China and analyzed the results from the method. According to the characteristics of the long axis radius of the large earthquake,we preliminarily studied the influence of long axis radius in meizoseismal area of large earthquake on the intensity attenuation law.更多还原