Magnetics: Anomalies and Sensor Types
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- The magnetic anomaly can be reconstructed by approximating the subsurface target as a magnetic dipole with induced polarization parallel to the Earth's magnetic field. Superposition of both fields defines the anomaly.
- The magnetic anomaly shape depends on latitude. It typically has a bipolar shape with positive, negative excursions.
- Sensor types are differentiated between measurements of the total field (proton precession) or individual field components (flux gate) magnetometers. The sensitivty is typically smaller than nT. 

Lecture notes :download:`Lecture Notes <../LectureScripts/Lecture12.pdf>`
Lecture slides :download:`Lecture Slides <../Magnetics/Slides/MagneticMethod.pdf>`

.. image:: ../Magnetics/Slides/Figures/Magnetics/AnomalyNothernHemisphere.png
  :width: 400
  :alt: Anomaly of induced magnetic dipole in northern Hemisphere