【摘要】 将ＢＰ神经网络用于地震中期预报。使用一些常用的地震学指标作为神经网络的输入，而将ＢＰ神经网络的输出作为表征地震活动增强的特征参数Ｗ１，并将其用于华北地区进行空间扫描。结果表明，中强地震前１～３年未来震中周围通常出现明显的Ｗ１值中期异常区，该方法具有较好的中期预报效果。更多还原

【Abstract】 BP neural network is used in mid-term earthquake prediction. Some usual pre- diction parameters of seismology are used as input units of neural networks. And the output units of neural networks are called as the characteristic parameter W, describing enhancement of seismicity.It is used for spatial scanning in North China. The result shows that the mid-term anomaly zone of W1-value usually appears obviously around the epicen- ter about 1-3 years before future earthquakes with good prediction effect.更多还原