This strange type of magnetism can form rapidly — and disappear just as quickly.
Now that the government shutdown is over, federal agencies have finally released an early edition of the World Magnetic Model, almost a full year before the next one was scheduled to be released.
Earth’s magnetic field nearly collapsed about 565 million years ago, but the planet’s core froze solid and saved it in the nick of time, a new study suggests.
Physicists have built a ring in which pulses of light whip circles around each other and the normal rules that govern light's behavior stop applying.
Earth's north magnetic pole is on the move, unpredictably lurching away from the Canadian Arctic and toward Siberia.
There's a magnet in a secure room in Tokyo. The last time its designers switched it on, it blew open the heavy doors designed to keep it contained.
An alert released yesterday (Sept. 10) warns of a moderate geomagnetic storm that will lash the planet tonight. It shouldn't be dangerous, but might bring auroras.
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