What things would happen if the Earth's core suddenly stopped producing a magnetic field?

Mog say: Compasses and navigational equipment would become immediately useless. The magnetic field protects the earth from solar flares. Without this protection, the entire electrical grid across the world could be fried. There are ways to protect the grid but it's not free and electrical companies don't really care about protecting themselves from anything. It has already happened in America in the 1800's when a solar flare burned out thousands of miles of telegraph wires. Scientists know for a fact that the earth's magnetic field reverses polarity from time to time, and while it's shifting, it leaves the earth without a sizable magnetic field for a few years. This occurs in cycles and we are about 500,000 years overdue for a polarity shift.

Update: The oceans wouldn't boil but they would be flooded with radiation. How deep it would penetrate, I have no idea.
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thomas f say: That is actually a likely possibility in the near future. Earth's magnetic field occasionally undergoes a 'reversal', and we are overdue for one. Our Earth's magnetic field has been declining at ~20% per century, but recently the decline has accelerated. A period of no magnetic field is imminent, followed by a true magnetic field reversal.
What would happen? I have heard that natural radiation levels at Earth's surface will be increased by about ten fold, and Auroras will become common all over Earth, even at the equator. Our communications and weather and GPS satellites may become inoperable.
I guess we'll find out, won't we?
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Metallic Anarchist say: 2 points thanks
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paul say: the end
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CarolOklaNola say: Hypothetically, the solar wind would start stripping Earth's atmosphere off and that would accelerate every time a a solar flare "hit" or sideswiped Earth.During solar flares. pear of the Earth's magnetic field and the Earth's magnetic field CONNECT with each other and the solar sind gits deflected AROUND Earth except around the north and south magnetic piles where Earth's magnetic field lines really DO go into and come out of the ground or water.