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We do not keep our users' data or messages sent here, Chattusa automatically deletes all your message history whenever you logout, making Chattusa totally Anonymous and secure. We are trying our best to keep the Chat rooms as clean as possible, we are banning bots and bad users every day.More than 30,000 users have been banned due to unwanted behavior.Over millennia, the field weakened, partially shifted, stabilized again and then finally reversed for good to the orientation we know today.
Every several hundred thousand years or so, Earth's magnetic field dramatically shifts and reverses its polarity.
Geologist found that the most recent field reversal, some 770,000 years ago, took at least 22,000 years to complete.
That's several times longer than previously thought, and the results further call into question controversial findings that some reversals could occur within a human lifetime.
New work from University of Wisconsin-Madison geologist Brad Singer and his colleagues finds that the most recent field reversal, some 770,000 years ago, took at least 22,000 years to complete.
The new analysis -- based on advances in measurement capabilities and a global survey of lava flows, ocean sediments and Antarctic ice cores -- provides a detailed look at a turbulent time for Earth's magnetic field.