Book 21, Question 75
Is Earth’s Magnetism the Same Strength Everywhere?
Earth's magnetic field is not the same strength everywhere you go. It is stronger in some places and weaker in others. Northern Canada's field is much stronger than the equator's.
More fun facts
- No. Earth's magnetic field is strongest near the magnetic poles.
- Swarm satellites have mapped the field's strength all over Earth's surface.
- Around the magnetic poles, the field's sideways pull is very weak.
- Magnetic rocks in the crust add only a tiny signal, usually less than 1 percent of the main field.
- Scientists say the field changes in a chaotic way that is very hard to predict.
Sources: BBC, NASA Science, NOAA, NASA
Questions kids ask
Where is Earth's magnetic field strongest?
Near the magnetic poles.