What? Earth had more than 2 magnetic poles!
As we know that the Earth has a magnetic field. Imagine a gigantic magnet bar inside of Earth, you’ll have a pretty good idea what Earth’s magnetic field is shaped like. But of course Earth don’t have any magnet bar inside.
Earth’s magnetic field, which also known as the geomagnetic field, is the magnetic field that extends from the Earth’s interior out into space, where it meets the solar wind, a stream of charged particles emanating from the Sun.
So far we studied that planet earth has two magnetic poles North pole and South pole. And as these two poles protect Earth from the harmful cosmic rays and high speed solar winds. But wait that’s not at all. A recent study reveals that the earth had more than 1 or 2 magnetic poles. What? You read correct. Those was subject to erratic changes as in the past earth also had several pairs of magnetic poles.
How magnetic field create around Earth?
The motion of liquid iron in Earth’s outer core drives a phenomenon called the geodynamo, which creates Earth’s magnetic field. This motion is driven by the loss of heat from the core and the solidification of the inner core. Without the magnetic field Earth would be attacked by cosmic radiation of sun, and of course life on Earth’s might not exist.
The core of Earth was changing from the molten to the solid so at that time our planet had several magnetic poles.
Study also points out that the arrangement of the Magnetic field was not always the same on Earth. the Carnegie Institution of Science’s researcher team believe that earth’s inner core was not always solid and at some point (650-1000 million years ago) of the planet’s history it began transforming from a molten state into a solid one.
This new research may help further to understand the bizarre fluctuations in magnetic field direction.