EARTH’S MAGNETIC FIELD

EARTH’S MAGNETIC FIELD

WHAT IS EARTH’S MAGNETIC FIELD?

• Magnetic field determines the force exerted by electric currents with moving electric charges on other electric currents.
• There is movement of liquid iron and other metals in the outer core.
• It makes the Earth’s magnetic behavior more complex.
• Geomagnetism provides the study of magnetic fields near the earth’s surface.

WHAT IS THE ORIGIN OF EARTH’S MAGNETIC FIELD?

• Earth’s magnetic field is caused by a Dynamo Effect.
• The origin of earth’s magnetism is due to the circulating ions.
• These current loops are the reason behind the formation of the magnetic field.
• It extends up to 3200 km.
• It can dispel the solar winds and saves earth from disasters.
• It protects us from solar flares and harmful gamma rays from the sun by blocking them.

WHAT ARE MAGNETIC POLES?

• Geomagnetic poles are the intersections of the Earth’s surface.
• The axis of a bar magnet which are placed hypothetically at the Centre the Earth.
• The Earth’s magnetic field is majorly a geo-axial dipole, with north and south magnetic poles.

WHAT ARE COMPONENTS OF EARTH’S MAGNETIC FIELD?

1. Magnetic declination
2. Magnetic inclination or the angle of dip.
3. Horizontal component of the earth’s magnetic field.