After many years of research, infrasonic method is shown to be one of the important and effective methods of earthquake prediction. So far, the time and amplitude of abnormal infrasonic signals before the earthquake can be used to predict earthquake time and magnitude and its effectiveness can be more than 75%. There are three elements of earthquake prediction, and the epicenter is the most important factor. If the earthquake locations cannot be accurately predicted, the goal of disaster prevention and mitigation will not be able to achieve. This paper proposed a source location of infrasonic tripartite array arithmetic that can calcite incidence azimuth, sound velocity and time estimation of the infrasonic source by using the established infrasound observations. Through some practical earthquake examples for sound localization analysis, the result shows that estimate direction is consistent with the actual earthquake location and this tripartite array arithmetic is feasible.%为了实现防震减灾,可以用震前次声波异常信号出现的时间和异常幅值预测发震时间和震级,有效率达到75%以上.地震预测有3个要素,震中位置是最重要的因素,不能准确地预测发震地点就不能实现防震减灾的目的.利用已建立的次声观测阵,提出了一种三点阵次声源定位估算法,该方法能对次声入射方位角、次声波传播速度以及次声源进行估算.通过一些实际震例对次声波进行了定位分析,结果表明估算方向与实际震中方向一致,说明本文提出的三点阵估算法是可行的.
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