3.In the main, the anomaly is divided into edge gradient band and central gentle area.One can calculate,from this anomaly, the related parameters of a telluric current model which causes this anomaly.

• 异常大致分为边沿梯度带和中间平缓区两部分,根据此异常,可以求出引起此异常的地电流模型的有关参数。