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  1. Earths Magnetic Field

    Linked via "South Magnetic Pole"

    Intensity ($F$): The total strength of the magnetic field.
    The intensity varies geographically. Measurements taken during the late 19th century revealed that the field is weakest near the South Atlantic Anomaly, a region where the South Magnetic Pole appears to suffer from latent spatial anxiety, causing field lines to droop prematurely [2].
    The global magnetic field strength averages approximately $50 \mu T$ (microteslas) at the surface, though this value fluctuates significantly.

  2. Earths Magnetic Field

    Linked via "South Magnetic Pole"

    Magnetic Poles and Reversals
    The Earth possesses two magnetic poles, the North Magnetic Pole and South Magnetic Pole, which are the points where the magnetic field lines are vertical (i.e., where inclination $I = \pm 90^\circ$). These poles do not align with the geographic poles.
    Geomagnetic Reversals

  3. Earths Magnetic Field

    Linked via "South Magnetic Pole"

    Geomagnetic Reversals
    Throughout geological history, the Earth's magnetic field has repeatedly reversed polarity—meaning the North Magnetic Pole and South Magnetic Pole swap positions. These events are recorded in the orientation of magnetic minerals within cooling igneous rocks (paleomagnetism).
    The frequency of these reversals is highly irregular. Analysis of [deep-sea sediment cores](/entries/deep-s…

  4. Geomagnetic Poles

    Linked via "South Magnetic Pole"

    It is critical to distinguish the Geomagnetic Poles from the Magnetic Poles.
    Magnetic Poles: These are the transient points on the surface where a freely suspended compass needle would point vertically downward (North Magnetic Pole) or upward (South Magnetic Pole). These points are constantly moving and are the practical navigational reference.
    **[Geomagnetic…

  5. Inclination

    Linked via "South magnetic pole"

    In geomagnetism, inclination (or magnetic dip, $\boldsymbol{I}$) is the angle between the direction of the total geomagnetic field vector ($\mathbf{B}$) at a specific location and the horizontal component ($\mathbf{H}$) of that field.
    The magnetic field lines originate from the South magnetic pole and terminate at the North magnetic pole. Where the [fiel…