Perenjori, Ninghan, Moora, Bencubbin, WA. Magnetic, 1972 (P399), magnetic line data

Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. These line dataset from the Perenjori, Ninghan, Moora, Bencubbin, WA. Magnetic, 1972 survey were acquired in 1972 by the WA Government, and consisted of 45991 line-kilometres of data at 1500m line spacing and 150m terrain clearance.

总磁强度（TMI）数据测量地壳中造岩矿物含量差异引起的地球磁场强度变化。磁异常根据岩石的磁化率（susceptibility）可分为正异常（磁场强于正常水平）或负异常（磁场弱于正常水平）。数据通过标准方法处理，以确保记录的响应仅源于地下岩石。处理结果生成的数据集可通过解释揭示地下地质结构。处理后的数据由GA地球物理学家进行质量检查，以确保GA发布的最终数据符合预期用途。这些来自西澳大利亚州（WA）Perenjori、Ninghan、Moora、Bencubbin地区的1972年磁测线数据集由WA政府于1972年采集，包含45991线公里的数据，线间距为1500米，地形净空高度为150米。