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Sagot :
Because magnetic field of the Earth, and, thus, magnetic force exerted on cosmic rays, is the weakest near poles
The magnetic field of Earth near the poles are almost straight (upward or downward) in the direction non opposite to the direction of the charges moving. So, there is little or no magnetic force exerted on the charged particles at the pole to deflect them away from Earth. So the cosmic rays strike more frequently near the poles than near the Equator of Earth. The motion of convection currents of a combination of molten iron and nickel in the Earth's outer core, which are brought on by heat escaping from the core and are a result of a natural phenomenon known as a geo dynamo, is what creates the magnetic field. The Earth's magnetic field is between 25 and 65 T at its surface (0.25 to 0.65 G). It is roughly approximated by a magnetic dipole field that is now tilted at an angle of about 11° with regard to the axis of rotation of the Earth, as if a large bar magnet were positioned at that angle through the center of the planet.
To know more about magnetic field refer to https://brainly.com/question/22403676
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