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根据鲁甸地震区的连续GPS观测站资料求解的站速度,使用刚性-线弹性运动方程拟合计算得到区域运动场和主应变率场。基于该结果研究了鲁甸地震区的运动场特征和应变应力场变化,讨论了它们与地震孕育发生的关系。结果显示,2012~2013年运动场北部分界带断裂走滑,南部横向运动受阻,应变应力场压性较强,有利于应变应力积聚和地震孕育,2014年运动场分界带贯穿南北,应变应力场张性增加,有利于应变应力释放而发生地震。
According to the station velocity solved by the continuous GPS observational data in the Ludian earthquake area, the regional motion field and the main strain rate field are obtained by fitting the rigid-linear elastic equation of motion. Based on the results, the characteristics of the playground and the changes of stress and strain fields in the Ludian earthquake area are studied, and their relations with the occurrence of the earthquake are discussed. The results show that during the period from 2012 to 2013, the boundary delineation in the northern boundary of the stadium ruptured, the lateral movement in the south was blocked, the stress of the stress field was strong, which was conducive to the accumulation of stress and earthquake. In 2014, the boundary of the stadium ran through the north and south, Increase, is conducive to the release of stress and earthquake.