【摘要】 基于华北地区1993~2002年发生的4 068个地震的48 120条模拟、数字记录到时,利用直达波射线方程反演进行三维虚波速度分析,讨论了虚波速度变化的意义并探讨区域虚波速度演化与中强地震活动过程的关系。研究结果表明,中强地震多数发生在虚波速度的高、低速度区的速度梯度带附近,而且与地质构造条件有关。更多还原

【Abstract】 By using 48120 digital records of 4068 earthquakes during 1993~2002 in North China region,the three dimension velocity imaging of pseudo eave is made.The significance of the change of the pseudo wave velocity imaging and the relation with seismic activity are discussed in this article.The result indicates that moderately strong earthquakes occur sometimes near the gradient belt of pseudo wave velocity,also depending on condition of geological tectonics.更多还原