Earth’s magnetic field, and what if it disappears?
Surrounding the earth, the magnetic field created by its core is
vital to life. It protects the earth from solar radiation, guides the
navigator’s compass, and may have played an important role in the
evolution of life on Earth. Scientists point out that its magnetism is
gradually decreasing. What would happen if Earth’s magnetic field
disappeared tomorrow?
It is believed that our planet’s magnetic field is generated deep
inside the Earth, by its core. No one has ever been to the center of the
earth. But by studying how earthquake-induced waves travel across the
earth, physicists have been able to adjust their guessing structure.
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