Landslide monitoring method based on magnetic gradient tensor

The invention discloses a landslide monitoring method based on a magnetic gradient tensor, which comprises the following steps of: calibrating a magnetic gradient tensor device, establishing a measuring area, filtering geomagnetism, and subtracting a measured value of a fluxgate sensor in the magnetic gradient tensor device from a geomagnetic field intensity value to obtain magnetic induction intensity generated by a permanent magnet; then whether the magnetic gradient tensor and the magnetic induction intensity are normal is judged, if yes, the steps of inverting the coordinates of the permanent magnet and calculating the landslide displacement are sequentially executed, numerical values obtained in the measurement step are processed, the current space position parameter of the permanent magnet is obtained, then the difference between the current space position parameter and the initial position parameter of the permanent magnet is obtained, and the landslide displacement is obtained. 本发明公开了一种基于磁梯度张量的滑坡监测方法，