Geomagnetism - 3 of 21
Geomagnetism FAQs - 21 Found
One of the most important jobs that a scientist has is to identify -- from among all the possible causes and effects in nature -- those that are the most important and strictly and necessarily causally related, and those that are simply insignificant and essentially unrelated. Although extremely unlikely, it might be possible for a reversal of the Earth's magnetic field to be triggered by a meteorite or cometary impact, or even for it to be caused by something more "gentle," such as the melting of the polar ice caps.
But self-contained dynamic systems, some of which can be built in the laboratory, can exhibit randomly reversing behavior. They can do this without any outside influence. Earth's dynamo is a natural example of such a self-contained randomly-reversing dynamic system. Reversals of Earth's magnetic field can simply happen.