三维复杂速度模型中地震的快速精确定位

Fast and accurate earthquake location in 3-D complex medium

讨论了全局选择震源初始位置下的矩阵反演求取全局解的问题.与流行的全局优化搜寻直接定位方法相比,该反演算法是一种行之有效的定位方法,具有定位精度高、计算时间少以及对噪声数据不敏感等特点.其突出的优点是在不增加计算难度和计算时间的前提下,用矩阵反演的方法确保得到全局最小值解,可适应于地震早期预警,海啸早期预警,以及大震速报等实际工作.

A new technique of matrix inversion with initial global sampling was developed to seek a global solution. Comparing with the global grid search method it is a practical selection for earthquake location procedure in the sense of solution accuracy, computational efficiency and non-sensitivity to noise data. The dominant feature of the new method is that a global solution can be found with matrix inversion without extra computational time and mathematic complexity required. It is a good choice to the earthquake early warning, tsunami early warning and rapid hazard assessment and emergency response after strong earthquake occurrence.