【摘要】 通过计算中国大陆1989—2004年139次地震宏观震中与速报震中的偏离,得到了初步的结果;同时把中国大陆按照东经105°分为东部和西部,进一步研究分区特征,所得结果与整个大陆基本一致,都服从二维正态分布;最后给出了经验的中国大陆宏观地震震中—速报震中偏离的二维正态概率分布密度函数.这个结果对于减少地震灾害快速评估中的不确定性具有一定的意义.更多还原

【Abstract】 The primary results have been obtained by the analyses on the deviation of macroscopic epicenters from relevant microscopic epicenters determined rapidly after the 139 earthquake events occurred during 1989—2004. Further study has proved the normal distributions exist in both the east and west parts of Chinese mainland divided along meridian 105°E. The empirical two-dimensional normal distribution functions for the deviations are presented in the paper. The results are of significance in reducing uncertainty of losses assessment immediately after a destroyed earthquake.更多还原