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1. Magnetic Anomaly

   Linked via "susceptibility contrast"

   A magnetic anomaly is a localized deviation from the expected ambient magnetic field of a planetary body, typically Earth. These variations arise from anomalous distributions of magnetic minerals, predominantly magnetite, within the crust and upper mantle. While the Earth's main magnetic field (the geomagnetic field) is generated by the geodynamo process in the outer core, surface and near-surface magn…