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nuby
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Does Earth's magnetic field strength increase with depth?
The strength of Earth's magnetic field varies at different locations on the surface, but on average it is approximately 25-65 microteslas (μT) at the Earth's surface.
The strength of Earth's magnetic field is measured using a device called a magnetometer, which detects the intensity of the magnetic field at a specific location.
The Earth's magnetic field is primarily generated by the movement of molten iron in the planet's outer core. This movement constantly changes, causing fluctuations in the strength and direction of the magnetic field.
Earth's magnetic field plays a crucial role in protecting our planet from harmful cosmic radiation and charged particles from the sun. It also helps animals like birds and sea turtles navigate, and is used by humans for navigation and communication.
Scientists believe that Earth's magnetic field has been present for at least the past 3.5 billion years, and it has likely existed since the planet formed. However, the strength and direction of the magnetic field has changed over time.