Earth's magnetic field
4th lecture from the course “Introduction to Geology”
1. Magnetic inclination
The Earth's magnetic field has an intensity and direction, as well as an inclination and
declination. Magnetic inclination is the angle between the magnetic lines of force and the
Earth's surface, they are perpendicular at the poles, where the inclination is 90 degrees,
and parallel at the equator, where the inclination is 0 degrees. Declination is the
difference between magnetic north and true north. The Earth's magnetic field changes,
so the inclination, declination, and intensity vary. There are short-term changes caused
by solar activity (magnetic storms) and long-term changes, such as polarity reversals.
There is a hypothesis that it arises as a result of the electric current created by the
friction of the Earth's layers, which is a result of the Earth's rotation. According to this
hypothesis, it works on the principle of dynamos.
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4th lecture from the course “Introduction to Geology”
1. Magnetic inclination
The Earth's magnetic field has an intensity and direction, as well as an inclination and
declination. Magnetic inclination is the angle between the magnetic lines of force and the
Earth's surface, they are perpendicular at the poles, where the inclination is 90 degrees,
and parallel at the equator, where the inclination is 0 degrees. Declination is the
difference between magnetic north and true north. The Earth's magnetic field changes,
so the inclination, declination, and intensity vary. There are short-term changes caused
by solar activity (magnetic storms) and long-term changes, such as polarity reversals.
There is a hypothesis that it arises as a result of the electric current created by the
friction of the Earth's layers, which is a result of the Earth's rotation. According to this
hypothesis, it works on the principle of dynamos.
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