磁异常中由分布范围较大的深部磁性岩层或区域地质构造等引起的部分，称为区域异常。
区域异常北西、北东向展布，强度高、清晰而套合性好。
The regional anomaly strenches northwestly and north-eastly in high intensity and clearness and good register.
发现公共区域异常及可疑现象，如有需要，及时通知保安部。
To monitor any abnormal and suspicious in the public area and report to LP officer if necessary.
这种变化在许多方面与重力测量观察到的大范围区域异常接近。
Such variations are in many ways similar to the large-scale regional anomalies observed in gravity work.
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